From my point of view, I think the OP is demanding to know if we will still profiting from bitcoins just as holders in the future, but I do not think so because I believe that the profit that early investors made from just holding bitcoins till date is very significant and that the chance to profit from just holding bitcoins will reduce that if you must profit very well, you have to do other things to really earn some bitcoins. This is really far into the future in my thoughts, and I think maybe around this time, bitcoins will already be in consideration for adoption. Bitcoin will maybe at this time take up more role as a currency than for just investment.