Hi I will invest to any idea about earn bitcoin. I would start from 0.1 BTC. If everything will be ok I pay more more money 
I wait for PW
I wait for PW You have not enough amount, it is just 0.1 btc, but i suggest you, you should try Altcoin trading, but if you say that you have no experience about the trading than do it, because if you want get profit, than should try it, otherwise investment is easily way but it is like risky, only do investment with that person, whom you can trust him.
I have traded some altcoin recently. I have made some profits.
I just trade the famous ones like the Etheruem and Monero.
Just , keep an eye with price movement and the volume in 24h to analyze the progress in the future.
If you will invest 0.1btc is just barely enough to start at trading and profit and grow your capital.It is ok to put all your money on trading rather than any ponzi's online.
I have an investment XAUR and XHI for both 0.1btc each and i made 0.02 profit everyday in fast trading. I love this two coin because their price range is stable and you will not
about dumping because devs are always active on pumping it.