Of course it might be genuine, but there's also a history of r/LegalAdviceUK getting a number of creative writing exercises. See this post: https://old.reddit.com/r/LegalAdviceUK/comments/1loyctr/rage...
"I just inherited $10 million from a dead relative I never knew, what should I do?"
Or:
"I sold my online business for $37 million, is this enough to retire on?"
These daydreamers always create fresh throwaway accounts and usually never come back to answer clarifying questions. If they do, their answers are vague and unhelpful.