A couple grand here invested in mining gear still chugging away.

No use crying over spilled milk thinking how much every coin you mined would be worth today. Better to think about the next goal or way to make money!  if i dwelt on evey time i should have held instead of sold my list would be endless. From collectibles, antiques, precious metals, stocks, etc... Any profit is good. Just keep trying. And sometimes selling was hugely smart. One never knows.