Lost a lot of money in Bitcoin

The volatility of Bitcoin is far greater than that of stocks . This makes Bitcoin a riskier asset, but its historical outperformance to the S&P 500 encourages many investors to take some additional risk in exchange for potentially higher returns. There are many reasons Bitcoin is volatile.

There we come to the first and most crucial way to avoid losing money in crypto:

Yes, you absolutely can lose more money than you invest in Bitcoin . BUT, you only lose if you sell, and you only gain if you sell. If you buy Bitcoin and the market goes down.