20K bankroll for poker and investing

Hello, I am currently 17 years old and have built up 20K from playing live poker and online poker in the past 7 months, I only plan on playing 20, 30 and 50 dollar SNGS Online while playing steady 4/8 limit and 2/5 no limit in the indian casinos. I was wondering, how i should allocate my 20,000 to maximize return. Should I save up more and open a restaurant? Should I invest into an index fun I.E Vanguard, Should i invest into the stock market...if so how much should I invest, how much should i keep for poker. Also, Should I just save up alot of money and take on Day Trading. Any comments iwll be appreciated