I went from a 4 string Ibanez Roadster to a 10 string bass (Binky) years back, now I mostly play 6 strings, and the occasional 8, 9 and 10 string!
You'll be surprised how much more you can express yourself on a 6 string, you might absolutely love it!
Treat yourself to a reasonably cheap second hand 6 string (HB or Ibanez), and if you don't like it after 6 months, sell it on, break ever (maybe turn a small profit!) and then use that money to upgrade your Squier
Or... if you get the 6 string bug, then welcome to the REAL world of bass! 😁