(That is not to prevent others from answering but:) Thank you all for these nice and quick answers!

I am completely new to cryptocurrencies. But I think that it is likely that one will sky-rocket in the next years. So, I'm thinking of investing in about 20 different cryptocurrencies, with say 10$ in each, and just wait for months or years. In the worst case, I loose 200$. If a single one increases by 100, I make a benefit of (at least) 800$.

Question 1: is this reasoning valid or am I missing something? Is it possible to buy currencies with only 10$?

Question 2: As I understand, I first have to buy bitcoins, then trade them for other crypto-currencies. Is there a single platform where I can trade anything or do I need to trade on multiple platforms in order to cover the range of altcoins I want (like VRM, XRB, GAME, GNT, etc.)?

Question 3: does it make sense to store them in a paper wallet (I mean, given that I plan on buying about 20 different cryptocurrencies).

Thank you