Can a 50 year old ride a bike?

I'm curious, is it feasible for someone who is 50 years old to ride a bike? Are there any physical limitations or concerns that one should be aware of? Could age-related factors, such as decreased flexibility or balance, potentially pose a risk? Additionally, are there any specific types of bikes or adjustments that would be more suitable for someone in their 50s? I'm interested in hearing your thoughts on the matter.