your dream is just a dream, i prefer work hard now to get 21 btc from 0.1 btc.
and how are you going to do this? investing? gambling? i do not consider that work, building from your btc is risky, it is not really work as it is not guaranteed.
I think with gambling way but is too risky make it doubled until 21 Btc, Gambling is only rely on luck. And about Investing i don't know about this.
Just wait someone send you 21 btc in your wallet
I think it just dream
