I don't think there's a definitive answer to this question. Trading can lead to losses and requires a lot of resources. Mining will bring BTC, but it requires investments into equipment, as well as further expenses with electricity bills and equipment management. Trading requires luck and/or special skills, whereas mining is more straightforward. But the simplest thing is to just buy BTC and hodl long-term. You don't need to invest a lot of time or resources, you just need to be patient and believe in BTC's long-term growth. There are risks, of course, but still.
Bitcoin mining and trading all require to have initial capital but with trading, capital can be small however it is faster in losing money through trading if you are a bad trader and especially if you use leverage or futures trading.
Bitcoin mining brings bitcoins to your wallet, but it needs time and sometimes you need to hold your bitcoin for some months to have profit or good profit. Small and weak miners have to sell their coins each month to pay monthly bills like electricity, human resource for operation, maintenance or other cost. Strong miners with deep capital can survive better and more easier in getting profit than weak miners.
There are months for weak Bitcoin miners to capitulate when they don't get profit but get loss and can not afford loss.
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