Yeah but that strategy only effective on some Top Altcoins like Ethereum, TRX or even Bitcoin but for some new Coin Or Token we should need to be more careful when there is some huge price movement, It can be good but also can be a bad sign and basically most of them was a bad sign, Rug Pull, Scam Team, Hacked, etc. Well, always DYOR!
No amount of DYOR can really prevent a rug pull,,, unless you know how to read code and can certify for yourself the audits mean the code is safe and cannot be drained from pools.
The problem is even the best like Certik audit and then later the projects scam.
So EITHER codes still have holes. Or projects lie about the code being on github etc.