Why would he put all of his money in crypto?

So my boyfriend apparently lost $12k he had almost $70k in the bank now he has $40k. I knew he dealt with cryptocurrency, but I didn't know he put all of his money in there. I'm like "why would you put all of your money if you lost that much?" He said " why not just having money sit and not making anything, I trust doge". I'm sitting here thinking wtf. I wanna do stocks too but I'm not putting everything I have in there.
Why would he put all of his money in crypto?
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