I bought this bank stock during the initial COVID-19 crash, and I'm sure glad I did.Wells Fargo (WFC 0.89%) was one of the best opportunistic investments I've ever made. I bought the stock in mid-2020 when the COVID-19 lockdowns were still going on. At the time, there was tremendous economic uncertainty, and as the most consumer-focused of the big banks, Wells Fargo became especially volatile. Plus, at this point, the bank's "fake accounts" and other scandals were still fresh in investors' minds.To be sure, ...