Bitcoin is revolution but i believe now it is not so perfect.
Yes, the blocksize debate was telling me something
POW is good but future is POS or maybe something completely new.
PoS is the future. it will be to be true soon.
Blockchain is too large and will continue to grow over time.
Hyperledger is an evidence.
Most miners are concentrated in China, wich is not good if we want Bitcoin to be money of the whole world.
Looks like a lot of manipulations.
So this, and many others problems will be overcomed by new coins and projects, maybe not now and in few years,
but in future will be, for sure.
Honestly, there are some already offer a fixing feature of bitcoin. LTC are similarly with bitcoin, but bitcoin has stronger caused by his history.