Cryptocurrency always has risk factors involved, but it varies from token to token.
According to my point of view, BNB is a safe investment option because it is the native token of the world's largest crypto trading platform token. I personally Hold some BNB and bought it at $325, still, there is hope to rise above $600+ if the bitcoin price rise to $50000+.
So Yes, it is safe to invest for long-term investment.