Explain
Compound interest in terms of a snowball
Compound interest is essentially a snowball rolling down a hill made entirely of your own inability to stop spending money on unnecessary subscription services.
You start at the top of the peak with a tiny, pathetic little ball of cash, perhaps a fiver left over from a Morrisons meal deal. As it rolls, it picks up interest, which is just the snowy layers of extra money sticking to your original lump. By the time it hits the middle of the slope, the ball has gained significant girth, rolling over a neighbour's cat and collecting stray debris like a forgotten ISA or that premium Netflix tier you only kept for one series of a Danish crime drama. It is no longer just a ball of savings. It is a terrifying, dense sphere of geometric growth that has gained enough momentum to crush a garden shed or a small hatchback.
The real trouble starts when that snowball represents debt, because instead of rolling through a pristine, untouched park, you are dragging it through a skip full of high-interest credit card charges. Every rotation adds more interest to the existing pile, turning your manageable tenner into a monstrous, icy boulder that demands your soul before Christmas. You are effectively outrunning a glacier made of fiscal misery that only stops when it finally obliterates your ability to ever buy a decent block of cheddar again. It is truly remarkable how quickly a small lapse in judgement becomes a recurring avalanche that requires a structural engineer to fix.
Where the analogy breaks downA snowball eventually hits the bottom of the hill and stops, whereas compound interest keeps rolling until the heat death of the universe or your bank account reaches zero.