Yes.  I think those that choose to purchase BTC early on will have more buying power later from the growth and desire for BTC, but it will not change the fact that BTC is valuable and useful just for what it is.  There will probably be a day when the price of BTC is saturated and does not fluctuate much, and there will probably be a great reward for those that invest early (There already is for those who bought a year ago) but there will be many people that will eventually need to use BTC and will use them with the sole desire of just having a way to transfer money quickly and without bank fees.  They will not see it as a ponzi scheme and it will still be very beneficial to them.