For newbies, I think the minimum amount to play and learn trading is 0.0050BTC . In Poloniex and Bittrex the minimum amount is 0.0005BTC. If you want to margin sell the minimum is 0.1BTC. If you only want to trade without a margin. You decide how much do you want to trade.
Hey there!
I would like to ask you what you concider a good amount of bitcoins for daily short term speculations. How do you think what is the good number for beginers / advanced / experienced traders? Or maybe it if better not to short and just buy some of any good alts and wai for a pump (like some days or weeks)?