I hold some $10-$50 worth of most cheap alts that are available on poloniex. It's my ticket to becoming a millionaire. Right now the biggest asset I won is 300 000 siacoin. BTC and ETH is a good way to win +50% or even double your money, but that won't change my life, so I go for the gamble with alts.
I think ethereum and bitcoin is one of the good investment and for sure the price of this coin will increase more in the future. I think this two can change your life if you have hundreds of bitcoin and ethereum for sure you will become rich after few years of holding. Many peple as of now investing in bitcoin and ethereum so the price is continously increasing so its better buy bitcoin and ethereum and hold it to make a lot of profit.