I believe it will always make a ATH as long as ppl always going crazy to make profits when the price is very low.. Yes because thats what the time big investors entering the market, so no one will reject bitcoin even at the very low price in my opinion , wherein indeed ppl will take advantage the situation to obtain massive profits afterwards like what always happen.. So its impossible as its very promising as well than other crypto currency in the market.
When it comes to highest price then this would be unknown because we cant determine on how far we've go as long the demand is there then the possibilities that it can reach out peaks.
How many years would be not able to determine and as long recognition would still continue then we can expect for new numbers that we would able to see.
When it comes to potential then theres no doubt on that but always remember about risk management if you do deal with investment.