Yes/No. In a sense all cancer is "genetic" involving changes to the DNA or epi-genetic - changes to DNA modifiers such as methylation. A related question is is multiple myeloma inherited. The answer is sometimes. The risk is about double with a family history. Here is one clinical trial studying this: https://clinicaltrials.gov/ct2/show/NCT00582621.
No. Myeloma does not appear to have a genetic predisposition.