I put my money into a nice s&p 500 index and let it ride.
And that's the best
approach for those living in US (as SP500 provides a comfortably stable 10% yearly), but seldom used... sadly.
In some countries, it's a bit more challenging, though.
Where I live (Poland, but true for most of Eastern Europe) investing in stock indexes is fairly pointless (they're very risky and usually nowhere near as profitable as SP500).
At this point I'm at 80% in funds (with avg return 8% yearly) - slightly below S&P (and even below the polish Stock Exchange), but a lot safer.
The rest is a fairly small number of stocks (currently 4) that I check on a weekly basis. So on one hand: it kind of works. Historically I'm at around 30% yearly (much better lately). But it does cost me around 10 hours a month. :/
Going back to AMD, I think quite a lot of investors are pretty naive... This discussion is a good example of the problem.
Let's just forget about those that buy AMD because they like the company (nothing to add here...).
We see comments that sales of Ryzen will get the stock to $20 or more... Well, earlier this year it got to $15 based on hopes that - after few months - seemed fairly optimistic.
Also the profit margin on Ryzen is still a great mystery...
The Q1 results were somehow disappointing on both revenue and profit - investors expected better figures after 1 month of Ryzen sales (which includes pre-orders).
For me the biggest problem with AMD is that there's no dividend. Possibly the best thing about investing in US is that almost all large companies share their earnings - often on a quarterly basis (which is almost unheard of in most countries).