I usually buy %10 of my monthly wage but sometimes more. I'd never measure the minimum though. Even I have 1$ I can buy BTC.
That never changed much for me.
Buying all the way up since 2014
I mean if you got Bitcoin right (i.e. you know its monetary policy, how new coins are created, how to store your funds...) what's the problem holding? I've always been here for the long run.
A piece of history for the Real r0ach, when he was talking about missing trains.....

Well, six months ago 68% of the coins were already mined. Why wasn't the price ~$340 back then?
Didn't investor know then that, within six months, 70% of the coins would be mined?
Easy, because everyone wants to buy "at the bottom", so the bottom comes and sits there for an entire year while they look at the screen and say, "hmm seems pretty stable here, looks like the bottom is in, but I think i'll wait and see if there's a flash crash, then I'll buy some then". Then the train starts to leave without them and they realize they're a fucking idiot.
That and shorters are good at keeping the price from moving...until they fail and lose everything:
