OP, for plebs like us, I am a strong believer of the HODL based on the Fundamentals of a coin, and the best in my opinion, would be Bitcoin. Because the problem with Technical Analysis is, there are people in the market who are hungrier, more talented, and more skillfull than us. Technical Analysis also doesn't work 100% of the time because more and more talented traders already know about it and they can counter-trade your trade.
I also think that bigger players can manipulate the market because they already seeing the market direction through the charts and they can hodl longer from selling or buying until the small traders get exhausted in the market getting RSI hodl overbought a longtime without reversal. Banks are capable of doing the manipulation as they have plenty money to lock around the market.
Whales could manipulate the market but to a degree, they can't manipulate everything and not that easily for most as well. You have to remember the crypto market reached to a level where it is a whole market and just one person can't really change it. Sure if you find a small cap coin and put 10 million on it to pump/dump then you could do that, but for most coins at the top level that is no longer a possibility.
This means that it would require billions and billions to change the price. Last time one person did it, it was 1.5 billion from Elon Musk that changed the price and the news of it impacted more than the money itself. So, I doubt whales would be able to do anything for the top 20.