I placed an order in coinbase on Jan 6. The funds were withdrawn from my bank account over a week ago. Today is Jan 17 and the money is still not available in coinbase. In the same time frame, I've made 3 deposits into Gemini, each was available instantly for trading and all 3 have already cleared the bank. I, like many people, started with coinbase because its a big name in an unfamiliar world, but as soon as my funds show up, they are moving out.