I do trading aswell in the short term, but your question is regarding investing - i am first and foremost an investor.
My plan is to accumulate bitcoin as much as i can.
For the long term i look at macro liquidity and general stock market sentiment. I also look at certain onchain data for bitcoin that coincides with the 4 year cycle. Even with this decade being so different, this has still worked.
Here is an image of M3 money supply of USA and Europe which shows strong correlation between bitcoin price and liquidity/fiat debasement that helps me for a zoomed out perspective.
Within this longer framework, i also use the volatility to accumulate. Other people like to dca consistently or buy dips, but I try to be more aggressive because i have constructed models with onchain data that allow me to have confidence to trade multi week or even multi month (some would call this swing trading). Here is an example of one of my models with backtesting.
In terms of short term trading, i dont focus on technical analysis simply because everyone else is, so less edge. I prefer to focus on orderbooks (which can also be useful for long term confluence for finding tops and bottoms)