Decide how much crypto you can lose before you buy any

Quick answer: Write down the dollar amount you could watch go to zero without changing how you treat your family. Buy it on a schedule, not a mood. Cap its share of your total savings, and make it boring to check.

That's the whole plan. The rest is how to keep to it when the price starts doing things.

Pick the number first

Do this before you open an exchange. Take a pen and write one figure on a piece of paper.

Here's how to find it. Picture the position cut to nothing by Friday. Not a dip. Gone. Now ask what changes at your house. Do you snap at the kids? Pick up extra shifts? Lie awake? If so, the number's too big. Cut it until the picture produces a shrug and a bad afternoon, nothing more.

Bitcoin has fallen by half or more more than once in its history. Smaller coins have done worse, and some have vanished. You don't need to predict the next drop. You need to be built for it.

For illustration only: if you had $100,000 in total savings and investments, a 5 percent position would be $5,000. That's an example of the arithmetic, not a recommendation. Your number depends on your income, your debts, your age and how many people count on your paycheck. A fee-only financial planner can help you set it for your situation.

The person with a $2,000 position he can ignore is in better shape than the man with a $40,000 position who checks it at red lights.

Make sure the foundation's poured

Crypto goes on top of the boring stuff, never in place of it. Before you buy any:

• An emergency fund that covers several months of bills, sitting somewhere dull.
• No high-interest debt. A credit card charging you 24 percent is a guaranteed loss. Nothing in crypto guarantees you anything.
• Any employer retirement match, taken in full. That's free money, and no token pays a 100 percent return on day one.

If those three aren't done, you aren't investing in crypto. You're gambling with money that has other jobs.

If you're coming to this late and the whole subject still feels foreign, start with Bitcoin, explained for somebody who skipped the last decade. Know what you're buying before you decide how much.

Buy it on a calendar, not a mood

Most people get hurt on timing, and the damage is almost always self-inflicted. They buy after a green week because it feels safe. They sell after a red one because it feels urgent. Both feelings are the market talking, and the market is a salesman.

Take your mood out of it. Say your number is $5,000. Buy $500 on the first of each month for ten months. Set it up, then stop thinking about it.

There's a real trade-off. If the price climbs the whole time, a lump sum bought on day one comes out ahead. If it falls, the schedule wins. You're trading some possible upside for a quieter head. For a position built to be ignored, that's a fair swap.

Nothing here guarantees a profit, and a schedule won't rescue you from a bad asset. Stick to the large, long-established coins you can actually explain to your brother-in-law. If you can't say in two sentences what it is and why it exists, don't buy it.

Put a lid on it

Here's the part nobody plans for: success. Say your position doubles while everything else sits still. Now it's a bigger slice of your savings than you chose, and it's got your attention to match.

Set a ceiling in advance. If it grows past, say, twice its target share, you either stop adding or trim it back. Write the rule down next to the number.

Trimming has a cost. Selling at a gain is generally a taxable event in the U.S., and crypto is treated as property by the IRS. That's a reason to keep good records and talk to a CPA before you sell, not a reason to let a position swallow your portfolio. The biggest threat to your crypto is your own filing system covers what to keep and where.

Stopping new purchases is the lighter option. It costs nothing in taxes, and the position can shrink back toward its share by itself if the price slides.

Make it dull to check

Attention is the second portfolio you're managing, and most men overspend it.

Take the exchange app off your home screen. Better, take it off your phone and check from a laptop. Turn off price alerts. A buzzing phone at 11 p.m. has never once improved a decision.

Pick one day, the first Sunday of the month works, and look at it then. Same day, same ten minutes, then close it. If you can't wait for Sunday, that tells you something about the size of the position. Go back to the paper and cut the number.

Watch your sources too. A steady diet of crypto influencers is a diet of people who want your money or your clicks. Anyone promising a date or a price is selling something. The crypto scams that catch careful people too is worth reading before you've got a feed full of them. And be most suspicious of the offer that arrives unasked, from a stranger, with a deadline.

Own it, and tell your wife

One of the better things about crypto is that you can hold it yourself. No bank in the middle, no one with a hand on the lever. That's the self-reliance argument for it, and it's a good one. It also means that if you vanish tomorrow, nobody can find your money.

So leave it better than you found it. Write a plain page for your wife: what you hold, where, and how she gets to it, kept somewhere safe and not on a sticky note. Walk her through it once, in an hour at the kitchen table. If she's never heard the word "wallet" outside a purse, start from the top. A secret position isn't self-reliance. It's a risk you've handed your family without telling them.

Keep her in the loop on the number, too. A husband and wife who agreed on $5,000 can handle a bad month together. A wife who learns about a $30,000 position during a crash has a different conversation coming.

The test

A year from now the price will be higher, lower or about the same. You can't know which, and neither can the guy on the screen. What you can control is the number, the schedule, the ceiling and the Sunday.

Get those right and the price becomes a piece of news. Get them wrong and it becomes the weather in your house.