You need to have atleast 0.1 Btc as per my understanding to start actually trading and get some small returns to it . You can trade Btc with some new altocoin and exchange back to Btc again with some gains for holding for some days .
i think we can even start trading from less that 0.1 bitcoin.
Correct, you can even do it from 0.05 Bitcoin like I do. Just choose stable coins and when the profit is coming up you can sell your coins to get the profit or if you were a risk taker you could try it with new coins.
Trading altcoins with your limited capital is fun, it's like gambling that offers you great odds. Having only
BTC0.05 is not a big problem as you can turn it into a bigger amount, just try to focus on what you are doing and monitor prices of different altcoins. Yobit is one of the better place with altcoins trading as they have a variety of coins to choose from, some called them shitcoins but who cares if it can deliver profit with great timing.
Trading altcoin for me I think isn't fun since you have to be serious in trading with them. The risk that an altcoin can dump immediately is a challenge in trading altcoin. In terms of trading site, I don't think Yobit is the best trading site since it's laggy on mine unlike trading site like ccex and poloniex wherein it runs smoothly on mine. Anyway, it's upon on users on how they like on trading site.