Bitpie.com is one of the safest wallets in the world. We provide on-chain wallet--Bitpie, off-chain cold wallet--Bither, hardware wallet—BITHD. The Open Platform(2b) is also a main direction of our development. Join in us on telegram: https://t.me/BitpieInternational; twitter: https://twitter.com/BitpieWallet. If you have any question, pls do not hesitate to reach out.