A lot of people in this thread are missing the main problem that people have. Yes, cash can be inconvenient, but by eliminating cash entirely you are putting 100% of all wealth into the power of banks. Those without a bank account will be left behind and FORCED to open one.
This gives banks and governments immense control and power over literally all the money you own. Given said power, they will abuse it for their own profit. It's not a question of "IF they abuse it" it is a GUARANTEED. They WILL abuse this power. If you deny this fact, you are living in a fantasy. Give people power, and it will be used, 100% of the time, and not to your benefit.
This gives banks and governments immense control and power over literally all the money you own. Given said power, they will abuse it for their own profit. It's not a question of "IF they abuse it" it is a GUARANTEED. They WILL abuse this power. If you deny this fact, you are living in a fantasy. Give people power, and it will be used, 100% of the time, and not to your benefit.