First, your money must try to preserve its buying power against inflation. But if prices rise by three per cent a year, that money is worth nearer £9,100 in today’s buying power. CPIH inflation was three per cent in May, 2.8 per cent in June, and 9.6 per cent in October 2022. Their job is to move money from cash thinking into future-self thinking. A cash ISA for retirement in 25 years may keep the tax break while wasting the engine.