What I mean by decent is where you can really see that it is growing and it can give you profit that is enough to be reinvested.
Call me dumb but I really don't know. I'm sorry.
My only source of coins is my signature campaign. I earn about less than 0.1 BTC per month.
Any advice would be much appreciated.
i can give you one suggestion that if you stick to you will never regret it.
don't ever think your amount is small or big even if you are investing 0.01
BTC or less. the only thing that you have to be concerned about is to ask yourself is "can i afford to invest and risk this amount".
your 0.1
BTC per month earning is a good amount to start with. just make sure to invest in a good altcoin not those that you hear about on the trollbox by some random guy.