I'd say up to 5% if you can do it. Take care of all your needs first, or else you'll end up having to sell and it may not be at the price you want. I'd get into a retirement plan too, if you can. Crypto is way more risky and bitcoin is at its all time high. You say we're heading for the moon, but we may already be there.
This this this. You need to take care of your needs first so that you can hold and not have to sell out early. Then you're making decisions out of desperation instead of thinking about what you're going to do next and the long-term road. I'd say it's important for you to always have a backup plan especially because cryptocurrency is such a sketchy investment. Seriously, you may make mad gains sometimes, but I feel like some people get lost in that and think that it suddenly becomes a reliable investment. Cryptocurrency should NOT be your primary investment, go get an IRA (I think that's what it's called).