Not a good idea to buy all your money with only one altcoin. Never ever put all your eggs in one basket. I suggest to buy at least 4 kinds of altcoin and also bitcoin for long term. Entering the market is also crucial in crypto investment. Make sure to buy on red market and not in green market.
Sure, the first main rule in cryptomarket - "never put all your eggs in one basket". If i were you, topicstarter, i would diversify the sum on 3 promising coins, for example Bitcoin, Ether/Neo and Waves.