Actually, i too vote for trading to double your investment, but now the BTC price is increasing too high day by day. just in 2 weeks, the price increased around $500. So don't invest in any casino just hold it in your wallet and wait for some days it will give you double profit. Trading also not give this much of profit I think am I right?
I agree with you. Right now the best option is to hold to bitcoins. They are an investment by themselves. Actually the alt coins are rising to, some even faster than BTC, so you can risk to swap some of your BTC to promising altcoins, but if you can, just invest some more fiat into BTC or altcoins, and see your profits grow.