The views expressed are gleaned from my own experience and are not to be viewed as recommendations.
I trade only one australian stock via options.
I selected this stock because I have found it to be 'honest and trustworthy' 90% of the time. When it does not perform as expected the downside is usually a donation of 2.5 to 10%. I typically enter late in the afternoon and sell in the morning. This stock returns 40 to 100+ per month one way whatever the trend.
The downside of trading one stock is that sometimes I might have to wait up to 8 days in between trades. Another factor is watching other stocks go to the moon. Not much of a downside really is it.