One thing you can be on the lookout for is orthostatic hypotension (postural drops in b/p) or postprandial hypotension (b/p drops after eating). You can google how to take your b/p to check for OH online. Dysautonomia symptoms can be related to Parkinsons and related diseases. Hoping and praying your REM Sleep Disorder does not progress into something more serious. I don’t know if it’s better to know about the prospect of other disorders or just be unaware, since there’s nothing you can do about it either way. As mentioned, live your life with gusto, and don’t let worry take a foothold.