Is it worth investing in coins if you only have a very tiny amount of fiat to invest with?

As the title says. I see lots of people saying how coins like ADA and DOT are good things to hold. My portfolio is already relatively diversified, but seeing all these comments gimme straight FOMO. I am fully aware not to FOMO into coins, so I think "well, I could invest a couple or euro into them" (since right now it's all I can afford). But is a couple of euros into any of those enough to see any worthwhile returns?

Also yes I do believe in the technology and value it as much as what I can make off it, but right now I've just started my crypto journey and I'd rather not royally fuck myself over financially.