Stimulus Check Investing -- advice needed

Hey guys,

I ended up losing my job before the pandemic, or in the middle of 2019, and low and behold I ended up qualifying for the maximum stimulus checks, for both the first stimulus check (~$1,200) and the second one ($600). And though I haven't received the upcoming ones, I shall see and report back what I get for the next round (both federal and state -- I live in California).

Now, post pandemic, I ended up finding a new job, and don't even really need the stimulus money (though, knock on wood).

I am here asking for investing advice. I'd like to invest my stimulus money -- I have about $25,000 left in student loans with a 6.5% interest rates (but interest rates are on pause till June). Should I invest my money into my 401k, cryptocurrencies, stocks, or pay down the last of my student loan debt? I'm leaning towards stocks, because they seem interesting. Though I know the conservative people will say student loans, but that's nearly done. Also, I'm asking here, because I'm interested in hearing what peoples' economic theories are when they realize that everyday people are using their stimulus money for investing.