Yes I think with increasing transfer fees, small investor like us can't join anymore. It won't happen fast but before all Bitcoin is mine, I predicted that it is no longer the King. I don't know what will be next after Bitcoin, it might not even Invested yet.
May be transaction fee is high for a small investor in bitcoin. But i dont think so as compared to other crypto currencies. Its transaction fees are very very less even for a small investor. If you think that transaction fee for bitcoin is high then i think their will be less investors in bitcoin. People more in liking of bitcoin. Bitcoin will never die. If bitcoin died it will effect other digital currencies.