i would love to do it, and in fact i was thinking about doing it a while ago but in the end i decided against it. because of two things: Risk and Stress
trading altcoin is not only risky business even if you are good at it but it is a stressful job and if you invest more you will have more stress which i don't like to have in my life.
At the moment im trading using about 0.7 of a bitcoin but trying to buy and sell at the right moment is tricky and even if i get it right I'm only making about 0.02 on a trade. Which isn't very much considering the amount that I'm rising in the trade. I'm sure others can make way more with alot less.
Much more important: can you survive a bearmarket? I'd think not.