I will spend my bitcoin to invest some ICO atlcoins Projects and trade altcoins. Beside that You can also buy bitcoin with cheap price for holding long term. Gambling is not highly recommended. Good luck to you.
investment in ICO is a best option but you need to have good knowledge about the alt coin in which ICO you are going to invest your money. i think it will better to invest in alt coin when it is registered in exchange. as you can observe it while trading before investing your money there.