Arbitraging (trying to profit from the best rates) isn't worth my time. The spreads between exchanges are too small to profit much from.

When there are massive price discrepancies that actually look attractive to arbitrage, it's usually because of insolvency or customer inability to withdraw funds. For example, when Wex.nz disabled BTC withdrawals, the price of BTC started trading extremely low compared to the spot price. Misguided arbitragers deposited USDT to buy up the "low-priced" BTC only to find out the "BTC" was worthless because it couldn't be withdrawn.

So I mainly stick with my chosen exchanges, which for now are Coinbase Pro, Kucoin, and Bitmex.