I just got introduced in Bitcoin, can new members join this campaign?

That was distribution and profit taking from those who manipulated it from $350 to $450. Ofcourse right now we retraced but this may be temporary and accommodated by another drop.

It might be a double top so watch out.

If this does manage to clear higher, then we can safely say the next target is $600s

Search for some Warren Buffet investing books. "The power of compounding" will be taught in many of those books.

BTC will always be used as a medium for trade which also include legal and illegal activities hence BTC can never be 'worthless' unless the blockchain was altered to become "obsolete" or more weaker than fiat.