Mined MINT since day 1 thought I'd sell at 9 and rebuy at 5-6 but it just shot through the roof

Well that leaves you with two choices, buy back in now in case it just keeps going up. Or wait for it to dip back down after this spike as often happens right after a price spike. Price spikes many dump and it comes back down before going back up again later. Always the little waves in the graphs of drops after spikes, the question is, will that drop be lower than the price is now.