That's a big amount of money if you will try to use it in trading, but if you will just invest it in a casino I believe you need to wait for a longer time before you will be able to meet your goal. Investing in gambling sites are profitable but not lucrative when you do not have decent money to put it.
Think of that, you better increase that amount in trading then invest in casinos afterwards.
You are giving good suggestion. I also think that he should try to do trading than gambling investment. But i think he don't want to take a risk, that's why he want to do investment, as he said he has no time. Actually people feel easy when they start trust-able investment, because they don't want to do struggle and hard working, and take risk.
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?