Invest some of it, yeah. You have to realize how frigging volatile bitcoin is, though. There's nothing that says we have to stay at or break above $2500. We could be back down to $1500 or lower by tomorrow. Do I think that's going to happen? No, but it's possible. So if you're young and don't have a retirement plan and have extra money to play with, do it. But be ready to lose money...and hope you don't.
I wouldn't put too much into crypto.
It definitely is, especially right now, because it has been commanding a very high price point which urged people to shift their attention to it making it more marketable increasing its every growing potential even more. Although it has its own risks like any investment or business, it is a good risk so to speak because the return is so high, and I think everything in life has a risk, even the most seemingly safest things may have risks of their own. I also do think that right now, it's never bad to ride the wave of the bitcoin market since it's brimming with advantages right now.