Coinbase, a cryptocurrency exchange, has begun allowing US clients to purchase bitcoins using Apple Pay, with Google\'s payment service to follow soon. Apple said in a blog post-Thursday that people who have a Visa or Mastercard debit card linked to their Apple wallet will be able to use the digital payments system to make purchases on the platform. In the fall, Google Pay will be integrated into the system. Coinbase also launched a service that allows users to make fast withdrawals of up to $100,000 per transaction at any time of day, with no restriction on how many times