Many people in this world are always questioning this, what is a good business? Well, good business is a business that begins, rather than being questioned because the hard thing in doing business is to walk to the first ladder. If we do not start a single step, we will never get to the top. Just as with trading, or investing in cryptocurrency, without trying and starting investing in it, you will not know how much profit you get, and how much experience you will receive if the market is down. Remember that experience is the best teacher.
Before establishing a business we need to be prepared. From the idea of what business that could build and a budget for it. Building a business is risky because you need a capital to do it. Just like what you said without trying to trade and invest you did not know if how much profit you will earn unless you will try to do it. Questioning a business is a way to learn from it because if you do mot ask you will not find an answer.