and what does the option i use most cost and as always it's also important to look out for your security personal data. expert julie martin has some basic advice for choosing the right provider look for multiple factor authentication look for making sure that there is a backup. and make sure that they are warning you about how you should be interfacing with the technology. whether or not my money is safe depends on how i keep it leaving my wallet is probably a bad idea using 1234 as a password for my. also not the best but providers need to maintain security standards to. technically speaking most do you want to buy serious providers are well protected the data is encrypted and stored on secure servers it's recommended to use which have been checked by at least 2 i.t.