Safest way to invest in btc

After the WazirX scam, I've lost confidence on trading platforms. I'm new to crypto investing so please bear with me. These platform security is not being monitored by any standard authority unlike stock markets. Therefore we'll never know when our money with vaporize untill it's too late. I'm not looking to invest in crypto as a trader but for long term investment. I was investing in wazirx and coindcx but after the incident i stopped investment on both platforms. Is it advisable to invest in crypto as a investor (basically invest and forget and not look into it daily) or only trading is the right path for crypto? Further I'm not looking into saving crypto in hardware wallet. It's a pretty hectic solution and don't want to do it on recurring basis.