You can keep all or part of your money in cash within your Cushon ISA, Lifetime ISA, Junior ISA, or GIA.
Your Cushon ISA is classed as a stocks and shares ISA, even if it holds cash.
Holding cash helps if you need access to your money soon. Inflation, however, can reduce the value of cash savings over time. For medium or long-term goals, investing may be a better option.