Configured properly, with backups sent to your e-mail inbox, this is probably the best combination of security and convenience.
Why Apple Is Afraid Of Bitcoin. the wallet app is still available here at the Cydia Repository for jailbroken.Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts.Various well-known developers and wallet maintainers also contribute to this project, so it should be fairly reliable.
One place I would definitely suggest not leaving them is in exchange wallets, at least no more than you can afford to loose, and for when you make your cryptographic millions Cold Storage.Over the weekend, Apple approved the first bitcoin wallet app since it announced, earlier this month, that it was going.Here is a curated list of best hardware wallets for your favourite cryptocurrencies.
Highly NOT recommended for beginners, it will only frustrate them.