I don't have actual cryptocurrencies but I have been practicing with a demo account. And lost a terrible amount of fake money during last weeks crash.
The potential for making lots of money is high, but the potential for losing everything might be even higher. I wouldn't be surprised if a second crash is coming because investors got scared by the events from the past weeks, and take what they can when the price has recovered enough.
In my opinion, you should only invest what you can afford to loose. But that is actually true for almost all investments that carry some risk.