Now Altcoin is the best way to invest your money?
I think it is. I will share my own experience. I started with eos and then found prg and lisk. These coins are literally so great that I can never get enough of them. They have great projects coming up as well and I know I shall witness a rise very soon.
For me there are lots of coins that investing in them is worth doing it, so just find some interesting coins and split your money to cash that you could lost (eventually) and cash that you will need in future and try your luck in alts.