I think literally every person in the world wants to invest more than they have but you can't do that in real life. You gotta know your limit, and stay within it. Also if you did have some cash, would you put it all into crypto? That doesn't seem wise in the slightest mate. I would choose freedom over slavery to the crypto markets anyday.
Yes, knowing your limit will always help you to cut your coat according to your size. I feel it is generally in human nature to get greedy, but at the same time, one would start tending towards a whole lot of risk with the OP's kind of thought.
Normally, no one need to go big, and you can just go as little as you can depending on what is affordable and also keep in mind it is a risk being taken with anything happening. I would not even put too much hope in alts right now.