I will buy altcoin, to earn bitcoin. Gambling is also my hoppy, and spend bitcoin on real life use. I will buy goods from newegg.
i would also buy a lot of altcoins and do some trading in my opinion, it always allows me to make some money out of the money i already have
buy bitcoin was full of research before you really put a lot of money on altcoin. but yes trading is the best choice to do with 10btc.
mainly trading altcoin always give an opportunity to benefit a lot in a short time.