No matter whether it is football or trading, the master is the one who does not dissipate their energy doing many things at once. They focus their entire talents on a single aim and do their level best to achieve excellence. Of course, they might also be having an interest in multiple things, but either they pursue other activities like hobbies or they just find a way to strengthen their core fields by indirectly taking innovative ideas from other fields. However, if you try to hold two purposes in life then you might not be able to focus fully on either, and both might fail.
Quotes; “You know that if you want to become a master, you have to spend hours every day working on the same movements.” – Quote by Dr Prem Jagyasi