options that you have:
* hold it until after the halving
* start trading bitcoin/usd or bitcoin/altcoin
* invest in casino bankroll
* give loans here or on btcjam
* search the forum for where to invest
*** research before you invest
It's a good thing that you have that amounts of bitcoin and the price keep increasing every year which is good to hold it for several years as investment. But if you want monthly income from that BTC12, I strongly agree with herbert options like invest in casino bankroll that you can check here https://bitcointalksearch.org/topic/bitcoin-gambling-investments-1585408 or else if you good at gambling just give it a shot but remember the consequence of get lose.
Gambling or casinos is not the best place to invest that high amount, its better to lend them to people at high interest rates or else invest it in altcoin trading.
I agree, altcoin trading has less risk of losing than gambling or playing in those casinos. But for those who don't have amd want am easy money then maybe gambling is the best way to do it. But when you gamble know the risks of it. Be ready to lose from what you invest. Don't blame others if you lose from it.