Well BTC and ETH is a good call, for the other one, don't have much information about it.
On the other hand, the anticipated bull run will surly come and those holding BTC, ETH will surly benefit, in addition is those holding potential coins too.
The bull market has shown its appearance in the market when its entry surprised us newcomers is also taking interest that is why the bullish trend is strengthening much more. I think we could be counted among all those users who had great time in 2017 became billionaires so yeah we can also become at least millionaire. It happens only if we make sure performing the way they performed and make it happen.