In order for Bitcoin to be widely used for payments, it is necessary to stabilize price fluctuations.

Question,
Bitcoin and other currencies A and Prepare B.
A and B are equivalent exchangeable and can also be equivalently exchanged for Bitcoin.

Is it possible to stabilize prices through market mechanisms due to this?

Isn't that necessary?

Even with id and bitcoin.

For example, the person with the least amount of stake in the top ten approves. how is it? do you have?

1,the sender secures the total balance and remits.
2,If the transfer is not approved, it will be recorded in the chain as a contract.
3,If the number of approvers is small, the approver will pay it instead.
(Therefore, the total balance of the approver is also secured.)
4,The amount reimbursed by the approver can be charged to the sender.

Finally I can't speak English.

スマートコントラクトが其の代替に成り得ますか？