There is no consensus on this issue, as it varies from person to person depending on their capital, experience, mood, and many other factors.
For example, I prefer part-time trading to full-time trading because I don't have a large capital and I have other jobs that prevent me from monitoring indicators, the market, analysis, and so on all the time.
Also, if you invest all your capital in trading and the market declines significantly, all your assets may be tied up in trades, and you won't be able to sell at a loss. Therefore, you'll need another source of money.