Well, they can reside wherever the private key is. That's the problem:
Some people entrusted their private key to a third party (the exchange) and the third party did not engage in best practices. The transaction time is no different for a private key on your personal computer -- the transaction time is determined by the hash rate of all the computers in the cryptocurrency network and a "difficulty" parameter that is set by majority vote of all of the computers. On Wed, Feb 26, 2014 at 2:54 PM, Terry Blanton <[email protected]> wrote: > You can store them on your droid: > > https://bitcoin.org/en/choose-your-wallet > > Some people keep them with the exchange because of the transaction lag > time. > > They can reside in only one wallet, however. > >

