It is good to diversify but especially look for where you can invest with absolutely rock solid protection and performance in all situations.
Music professionals take a lot of work to conduct their music business and their catalogs. But sometimes things can get tight and you need funds.
Royalties could be your perfect income investment. Intellectual property assets with consistent earnings may provide you with solid income.
When investing for the long term you should seriously consider letting Warren Buffet manage it. Annualized returns of close to 20% historically.