If it does become a long-term trusted store of value, BTC should trade around $2,000,000 a coin (depending on how many coins are lost and are actually in circulation). That is over 100x the price of where BTC is today.
Where do you get this figure from?
Bitcoin has the basic characteristics of a store of value, the main one being a limited supply. It will need to have some utility for it to be trusted as a store of value so it must succeed in some form as a currency.
True, bitcoin has the perfect characteristics to be a store of value in fact its characteristics are even better than gold, however there is a lot of competition with many other alts trying to take its place so if bitcoin is become a store of value it needs to leave no doubt that it is the best coin in the market and for that it needs to be adopted as a currency or have some other use.