You can always copy someone else 's logo.

 

Spacex Logo

Here we have the Spacex logo. (Spacex is Elon Musk's rocket firm.) This is the firm that describes their rockets blowing up as "Rapid Unplanned Disassembly".  An original turn of phrase.

But I noticed a similarity between parts of the Spacex logo and parts of the Reebok logo.

Spacex logo (Detail)

The "X" of the logo looks rather similar to the graphic flourish that you find below the word "Reebok" in the Reebok logo.  

Reebok logo (Detail)

Reebok logo

Will most people notice these similarities? Probably not, but that does not mean that what seems to be copying is acceptable.