It was well known that bitcoin has its limitations and when it reaches that certain amount no BTC can be use but I think that other cryptocurrencies will takeover and I strongly believe that crypto currencies will be use in our everyday life and will continue to develop.
It is not too late to invest in bitcoin or other cryptocurrencies  you just have to be wise when to invest and how much are you willing to risk in that investment. But! who can tell but lets see if someone will do much better than bitcoin, as of bitcoin is bitocin.