Are there any REAL arbitrage trading opportunities?

I see a lot of YouTube videos on crypto arbitrage trading, and they all smell like scams. For one - websites like cardano-trades or aimbitcoin have the same layout, and the same person talking about them on the YouTube channel. And the videos themselves aren't too old - just a few weeks or months.

Second, I have accounts on Coinbase, Kucoin, Bitstamp and a few other exchanges and when I look at them at a glance, I don't see the spread between the buy and sell values across these exchanges being big enough that if I include the transaction fees, I can buy in one and sell in the other and still make a profit.

So all that being said, are there any real arbitrage trading opportunities between reliable/well-known exchanges that any of you have been successful with? If not my current strategy would be to dca buy on something like Cosmos (ATOM) and benefit from the 9.22% APY.