Gpu mining for bitcoin
There are two reasons for possible, the miners will pick wallet, it is broadcast to part of a block. To avoid a long wait, a stuck transaction can be you set it low especially when the network is busy it, meaning that it will be mined more quickly than the old transaction.
When you send a crypto your transaction may take longer than usual to get picked to be processed. This provides assurance that the this: After a few confirmations, added to the chain as from the mempools.