I guess many 'retail investor' made good return in year 2020.

Many 'NEW' retail investors join the capital market in year 2020 due to MCO, thus they helped and pushed up the share prices.

With the liquidity in the market from the 'stimulus packages'.... this is not unexpected. Almost everyone can profit from any counters.
站在风口上，猪都会飞。

I had good return in 2020 too but start losing some gain by catching a falling knife (Supermax). 

Although I have sold it but i bought it again, together to TopGlove.

Hope not cathing another falling knife this round, else gain will be wipe out by a quarter. 

2021 is the time to test investment skill and patient.

提醒自己，冷眼的话：

在过去数个月中，部分成长股（多数是科技股，部分是医疗用具股），股价暴升十数倍，大部分（不是全部）投资者对这些企业的前途过于乐观，是不实际的，投机的成分较高，到将来业绩表现不符理想时，股价多数会打回原形，被套牢者可能5年、10年后都无法回本。股市菜鸟最好提高警惕。

我被套过十年，明白他的话。