Before looking at fund flows, get the rules straight. Today, let's talk about on-chain transfers.
Once a withdrawal request from an exchange has been broadcast to the blockchain, the exchange can't reverse it. You can only cancel it while it's still under review.
Before sending funds to a new address for the first time, send a small test amount. Once you confirm it arrives, send the rest. Paying one extra transaction fee is worth the peace of mind.
By the way: $BTC is quoted at 81492.12 (24h -0.67%).