It failed because it didn't get the support of crypto enthusiast. Like in the case of Maduro's Petro, a supposedly gold backup cryptocurrency. Well the first intention for introducing this is to circumvent the embargo against them.

Even the whitepaper itself is ambiguous, and the only way they are going to be used by Venezuelans is by force by government. While the Russia crypto rubble is also a failure, and as we all know their government wanted to control everything which goes against the very tenent of cryptocurrency.

If a bank or financial organization fails to start a cryptocurrency project, the biggest possibility is that there are too few people involved. Compared with ordinary cash bank cards, only a small number of people can accept Bitcoin and are willing to try it. Perhaps Bitcoin will change someday. This kind of project has the possibility of success.

I think that it will be the only way too, a government mandating the use of a institutional cryptocurrency will be the only way that they can pull off. I think the reason that those two failed is that they were introduced at the times of turmoil and the people are not in any way trusting their government when it comes to this kind of thing, sort of like giving the vibe of forcing them to use this is not the way, look at bitcoin.

What Crypto projects are you talking about? I haven't heard of any huge projects related to crypto currencies initiated by the bank. All I know is some that few banks around the world are willing to integrate blockchain technology into its current system. Integrating blockchain to their system does not mean that they are adding crypto currencies. Blockchain isn't crypto currencies. Blockchain technology is used to power crypto currencies.
Even if banks make crypto currencies it isn't going to be like the regular decentralized ones we have.

There is a complete contradiction between banks and cryptocurrencies. Banks are centralized and cryptocurrencies are decentralized, so when you hear any bank project, the word "centralization" will jump directly into people's minds. They will not trust such projects and therefore it will certainly fail. Banks launch central digital currencies and they cannot make cryptocurrencies.

While Banks are considered serious threads to Cryptocurrency, Although many central banks are looking into issuing digital currency here are few banks increasingly starting to offer Crypto projects from last year like Goldman Sachs, Barclays etc. This means the revolution of Blockchain is expanding and lot of countries are in talks to establish their own coin from their national banks. The new era is all set for the future.

Bank is a highly centralized entity and/or organisation, and to be frank, their level of centralization goes far deeper than what anyone can imagine and therefore if they are to get involved with the crypto space, they will also bring in their centralized features and nothing more, in fact their use case will be an advancement of what they are already into and known for, and since a good number of people in the crypto space are already against centralization, they will most likely ignore the bank crypto system. Use Ripple as a case study, right from time immemorial, many people do not really fancy them because they are highly centralized, and this same attitude towards Ripple will be same attitude people will channel towards any bank crypto system. In the case of being successful, it might be , because banks will look for ways to get their customers engaged but that will also give more people the chance of knowing about Bitcoin, and in the long run more investors to Bitcoin.

If you're hoping for a bank to create a cryptocurrency you'd get rich from, good luck turning that dream into reality! We're talking about banks! When did they ever help humans really?

They keep failing because so far nobody's been able to create something better and bigger than Bitcoin. It's just too strong and with too nice principles to be overtaken by the currency created by an enslavement system.

People are choosing crypto over fiat transactions because they don't want regulators and governement to meddle in their asset and funds, if bankers or government starts creating their own crypto it is destined to be a failure because they will not get any support from crypto enthusiasts and other folks who don't use crypto will carry on with fiat instead of government or banker's backed crypto.