If i have that amount of money i will invest it to Bitcoin and Ethereum because those two are the stable cryptocurrencies compare to others and altcoins.
Like what you answer on your own post the top altcoins before are now gone because they dont have stability in the market.
The two coins you mentioned are good to invest into now due to the price of the market but I want you to know that no crypto currency is stable in terms of price because it the level of demand and supply that will tell the price of each and every coins.