The biggest flaw in this suggestion is where will the young investors will get that 200$-500$ investment money in daily basis. Even a grumpy investor like me with a decent cash on my bank can’t keep up on this high frequency investment. 
If someone can invest 200$ per day on Bitcoin, I guess he doesn’t need to aim to become a millionaire since he already is. Maybe remove 1 zero then this thread make sense.
If someone could invest 200-500 dollars daily for three years then they will invest 219k-547k during that time, showing that such a person was already in a very comfortable position from which they could do some very good moves, and it is obvious very few young people will be on the conditions to do this, however it is not a bad idea for the young to work hard, save every single penny and invest that money in a portfolio of good assets, since the earlier you become an investor and the longer you can hold, the better your results will be.If someone can invest 200$ per day on Bitcoin, I guess he doesn’t need to aim to become a millionaire since he already is. Maybe remove 1 zero then this thread make sense.