Buffett says:

“Don't give up on projects that look good today because you feel like you might find better investment targets tomorrow,” Buffett says. DARE TO LET GO AS LONG AS YOU APPROVE, BUT DO NOT FOLLOW THE WIND UNLESS YOU STUDY WELL, FOR “BE CAREFUL WHEN THE NEIGHBOR IS GREEDY; BE GREEDY WHEN THE NEIGHBOR FEARS.” When the food market moms and the cleaners are all buying this stock, you should know that the danger is over. It's only after the tide that you'll find out who's been adventuring naked. Because “risk comes from ignorance of one's own investment behavior.” We have to learn to 'wait' and learn to 'let go', although it feels like facing up, but the downside of this line is hard to grasp.
The old dragon elder could also turn into a snake tail, it seems $Nokia Oyj(NOK.US)$ In the same way, small companies in the past will also take off after subsidence, such as $Tesla(TSLA.US)$ And, of course, there's Buffet's favorite. $Coca-Cola(KO.US)$ Flat and stable.