Better would be investing in Bitcoin, but if you don't trust it, then choose Ethereum, certain altcoin which will grow, maybe only a little bit, but will the price'll be better than now.
It's between bitcoin and ethereum for the first and second choice.
I see that there are too many people here that are saying that XSPEC is a good one. I don't have any interest with that coin or whatever will be for that coin in the future. Invest only to the coins that you are sure of it that's going to be big in the future.