Bitcoin is a very new addition to technology and economy - just give it some time, bitcoin has not failed and will be a great currency someday/

I think there are still many things and the process is still long, as we know that nowadays more and more countries are legalizing bitcoin so I'm pretty sure that someday bitcoin can be used for currency.

1st things 1st , bitcoin ain't a currency . It needs to be regulated by a government and backed by a safe heaven asset (silver/gold .. ) to be considered as a currency , and of course to be accepted as a payment method by everyone and every bank . In addition , neither one of bitcoin and the blockchain technology are considered as fully mature so we ain't even close from calling bitcoin or any other cryptos a currency, at least from a certain approach .
I do prefer to call cryptos as an investment or a future currency project , because they are the currencies of the future for sure , we just need to control the fluctuations a bit to gain more credibility and trust from the people who are still hesitant and we'll be good to go.

But bitcoin doesn't failed as an investment. Many peoples have gained their profit just only from holding bitcoin for a long term.
becoming a currency that used by everyone is a hard goal because there are many cryptocurrency than bitcoin, there are altcoins as well.

Bitcoin is now used as an investment and not a method of payment, but I think this will change in the future. Some popular online shops accept payment in bitcoins, I think with time there will be more such stores.

Its tough as bitcoin is a decentralised currency tgat cannot be controled by govt. Yes its being manipulated by whales however it will keep incrreasing in price.

We can't say this thing right now because the future are still bright with bitcoin. Yeah, for now a lot of black propaganda just to ruins bitcoin reputation but I still believe in the future of this thing, bitcoin will become a major currency in the future. This is just the beginning.

As with the passage of time the digital era is there so that everything is converting to digital So that the currency is also become digital and bitcoin is the digital currency but most of the people hate it because it is decentralized currency and effect the official currency of the state.but its future must be bright and can used as the secondary currency for buying.

Bitcore has bigger blocks than both bcash and gold and was there before any other fork was. Wonder why you didn't mention bitcore?
And fyi bcash or bitcoin gold are never part of a back up plan.