I think the next couple of years will be interesting for them as they progress, I believe they could reach the Championship if they continue their upward trajectory but that's when the shit gets real with money needed.
League 1 will be tough next year due to the teams that will be in it, Wrexham currently sign a lot of established/experienced players from higher leagues but on good money, like Paul Mullin, Steven Fletcher, Jack Marriott, James McClean etc so for that model to continue they'd be bring in Championship players who most likely will be on good money anyway.
My m8 is a Wrexham fan so happy for him, I'm not convinced on Parkinson but we'll see.
A podcast I listened to had an interesting take on them, that all the interest from Tik-Tok, Aviator, Expedia to the TV series is not because of the town, or the club but Reynolds & McElhenney and let's be honest Reynolds.
If they decide to cash in on their investment (for which they are charging 3%) and sell the club to say a Hedge Fund the interest would wain, especially from American viewers.
That being said I expect them to be in the teams in the division who will be top 10.