I have $100,000 to invest but want to safely double it in a year. Any suggestions?
I think you dont have enough experience on this forum you need to read more topics regarding altcoins and trading discussion getting some tips into your co-members and if you really do then start with small amount of money until you succeed then make it higher and higher till your hit your goal.
Altcoins investment is riskier than putting your money in bitcoin, if the OP is not in a hurry to double his money I think buy just buying bitcoins now and hold it for at least a year will give him a chance to double his money. It is as simple as this and you need is just to trust bitcoin's future.