At $80 I was mining using custom ASIC. At $20k I was trying to convince myself not to sell and that I was in it for the long run. I'm still in.
I virtually went from £0 to £4k to £800. The ASIC miner (which I can now use as a nice doorstep) was paid off by selling half the amount I mined back then, so as of today that is still a £800 profit.