I think personally more money can be made but for now it's not advisable to put all your eggs in one basket. Why not invest in real estate or better still get professional advise. Buying houses is not a bad idea but starting your own family and having a secured future is far better now!
Care about the interest risk though as it will have a sort of impact in the bonds from your investments. Although you can just simply invest in other coins for your convenience. You can always have the time to check out the earnings you get through CMC, if it is in the case that the coin you're currently investing is in the top 50 or top 20. Besides inside of your choice of investments in altcoin comes out the choice of exchanges with a high trade volume.