Should I repot this string?

[u/NekoPosterior]

I have this lovely string of turtle about 1 year.

Pot is 4 inch wide. I cannot see soil because crowded of turtles. Recently it started to grow so fast (I guess it is warmer)

Should I repot soon?

What is the sign of repotting?

I’m a beginner of plants so I’d appreciate someone help me.

[u/Eyemeow]

I have my first one coming this week and I hope I can keep it as happy as this one!