If you allow banks to conduct transactions off the blockchain you've just removed a fundamental feature of bitcoin, which is public verifiability of transactions AND you've opened up the opportunity for banks to inflate the money supply (the same as occurs with fractional lending).
They're already allowed to. It's up to the users of Bitcoin to decide to use such a system or not. It's only recently that scaling and fees became an issue so there was previously no need for this.
In the future I believe exchanges will start offering interest for balances held, it'll just require exchanges realizing how quickly they can attract accounts and balances (from which they can charge transact fees) if they offered such an appropriate benefit.
Which requires them to loan out money at interest, which makes them fractional reserve.
It's really driven by greed. People want interest on their money, so they're willing to accept a fractional reserve system. Historically in the US, and pretty much everywhere else as well, The fractional reserve system got so big that inflation was needed to keep it going. So the gold backed currencies that backed the money had to drop the gold standard so that the system could continue without bank failures. Now with Bitcoin the inflation of Bitcoin itself (which is the equivalant of the cash that backs bank money) cannot occur, or can it?
Ethereum hard forked because people were mad about their bad decisions that let them fall for a trap. These people wanted their money back so they hard forked Ethereum to give it back. What if Bitcoin exchanges fail and people lose money and everyone is mad and they demand that a hard fork of Bitcoin be made to bail out their deposits in failed interest bearing exchange accounts? Bitcoin can fork in the same way.
You say that you're against this idea but if you say that exchanges should pay interest then you're paving the way for it.
Can you imagine the damage if exchanges were linked in this way and when one of them are compromised/hacked? The
hacker will not only steal from one exchange, but rather from all exchanges that are linked. A lot of people use Bitcoin,
No it would only affect that exchange, and any money that was sent to that exchange but not yet balanced due to an inter exchange Bitcoin transaction. The imbalance should only be a couple percent at most at any given time, so the effect on other exchanges would be minimal, and how much of an imbalance an exchange allows at any given time is entirely up to them.
The reason why I somewhat think that this is a good ideas is that it is completely voluntary. You don't have to be a part of it. You can still keep your coins in your own wallet, just like you can keep cash at home and not put it in the bank until you need it in there to write a check to somebody.I understand that there are a lot of negatives, but it mostly relates to people's greed and the result of lots of greedy people using a voluntary system like this.
Right now 3-4 transactions per second is what the network can handle. Maybe that can be boosted up to 30 - 40 transactions per second but at that point the average person will not be able to run a full node. It may take 20GB of RAM or an expensive 2TB SSD. So eventually some kind of centralization must occur for Bitcoin to continue to grow. My idea is one method that gives people the freedom to participate in a lange Bitcoin network while keeping a full node wallet at home at the same time for their savings.
See the real danger here isn't the fractional reserve Bitcoin exchanges which would be voluntary to use, it's the result of the failure of that system that would cause lots of people to want to hard fork Bitcoin to bail themselves out.