A friend of mine told me that now is not the right time to mine Bitcoin, because this area is almost completely hegemonized by rich people. As a beginner, of course I believe that, because he is one of the veterans in the mining field. If that opinion is wrong, please correct it to show the actual truth.

Then my friend said, there is still an alternative to do it, that is by mining altcoins that have a low difficulty level, then after you get the block reward, you can sell it & buy Bitcoin.