Getting "Left Behind" is not an option.
If everyone who reads this thread goes all in, will the rally start sooner?
If everyone in the world bought just .1 BTC ... why, prices would go through the roof & streets would be awash with blood.
This is pretty unlikely, so no need to panic

Not "everyone in the world", but
"everyone who reads this thread", would be enough to warm up the rally.
BTC doesn't need to "go mainstream" to reach much higher prices. You eventually need more than ~17 Million people to realize they desperately want to own at least one whole Bitcoin.