So I can only invest small and have put some funds in some cheaper coins. Then there are these more expencive ones. Is there a point of owning 1 or 2 of each or is there just no chance to make any significant profit that way? Sorry if this is a really stupid question, I'm a noob.
It's all in cost-benefit analysis.
There is a point in owing 1x of anything that is, or can be, worth more than, say, 100 USD, but anything besides that, and owing too many, is just a nuisance - you have to track more coins, pay more fees for trading the same value etc.....
I is always the best idea to build a portfolio, but also not to diversify all too much.