A crucial missing data point is that Coinbase does all their transactions off-chain. If you send Bitcoin via Coinbase to a friend, it doesn't get reported on th

A crucial missing data point is that Coinbase does all their transactions off-chain. If you send Bitcoin via Coinbase to a friend, it doesn't get reported on this chart. They have their own accounting system. Bitcoin at its current stage cannot handle many transactions, as you point out. However, this doesn't mean there isn't a plan to make it handle many more transactions. See https://en.bitcoin.it/wiki/Scalability https://en.bitcoin.it/wiki/Scalability for more.