I like safedice.com and bitdice.me to invest some of my coins
Yeah right. Just dice is a good place for investing on altcoin. But i suggest also vslice because they are now developing many ethereum based gambling that will attract more players. The coin right now is under development but you join on their slack. You will know that their developer has a lot of plan for development in their project and investing really a good shot
My first investment is also justdice and btc casino was just starting at that time. I remember justdice is still accept btc at that time. And i got to see people bet as high as 500btc in one shot. The bankroll can change from positive 2000btc to 0btc within 10min. It is really crazy to see the bankroll varies so much and it is giving me a lot of heart attack.
That guy must be Nakowa, who took down all JD profit at that time (He profited total ~ 4k BTC). All JD investors (if you were one of them) obviously got heart attack when that happened