Trading is the obvious way to try making money with crypto, but it has risks.  Lending might be safer - you loan your crypto to others through platforms that connect borrowers and lenders.  The borrowers pay interest that comes back to you.  So you earn money without selling anything.  Less risk than trading, but still not foolproof.   

Im no expert, just thinking out loud about options beyond trading and those you mentioned.  Lending could go south too if borrowers default.  But handled carefully it generates income from assets you keep.  Steady money flows beat volatile value swings.  Though I suppose traders seek that volatility, viewing it as opportunity.