Will personally choose to invest in safe stocks and avoid high volatility kinds for now until I built up my portfolio and will manage a portion for higher volatility. High risk high returns.  No right no wrong on any investing style. Sell loser and buy winner could be working for some people. Not working for me yet, DCA works better and are for me. Very hard to identify winning or losing stocks and will have to keep monitor the market and release the position quickly. 

$Apple(AAPL)$has strong fundermental and over the past few years new iPhone launches have always lead to out of stocks situation in Singapore and people waking up early to queue for the phone. Without fail Apple keeps improving and coming up with new phones every year consistently and also puts up effort to ensure their supplies is consistent. They also looking at other products like electric carsand VR headset as well.Have been using apple products like iPhone MacBook and AirPods. So am bullish in Apple on long run. @MillionaireTiger

Will recommend newbie to go $STI ETF(ES3.SI)$ first as its very stable and simple. Spread across different industies with major top Singapore companies bluestocks. Trust the overall Singapore economy.For others who want specific industries can consider:Bank - $DBS GROUP HOLDINGS LTD(D05.SI)$bring one of Singapore largest bank and the trending of this stocks has been relatively stable. Company also has long history.REIT - $ASCENDAS REAL ESTATE INV TRUST(A17U.SI)$well known and hold great variety of property worldwide.