I personally will trade when I think it is a good time for trading and I can gain profits faster. For trading, I will take profits for few days, I rarely target for weekly. While I prefer to invest if I think the coin will have significant growth in the future. Most of the coins that I'm holding for a long time are reputable coins, those coins who are proven already for some years.
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So distinguish which one you want to trade and want to invest in for the long term.
No need to research anymore, long-term investment is certainly the choice is Bitcoin and you can also choose ETH as a second investment option because you see how ETH's potential in the future is quite good, experiencing significant development and always following the price of Bitcoin.
For the trades you make, it may be very appropriate when the market is hyped and some of the coin volumes you want to trade are large enough so that price movements will be faster.
Taking profits in a few days or trade scalping mode may be more suitable.
It will be done quickly, but you also need good technical knowledge and already know how the market will go.
Don't guess without knowing the basics of trading, it's like gambling and has no clear direction.