If you’re in the UK and want to use Polymarket, DeFi, or on-chain apps, the first job is simple:

buy USDC cheaply and move it to the right network.

For most people, the easiest route is Coinbase . If you care more about execution quality, Kraken is worth comparing.

Quick route

  1. open Coinbase or Kraken
  2. deposit GBP
  3. buy USDC
  4. withdraw on Polygon if you’re using Polymarket

Best beginner option

Coinbase is usually the best beginner choice because it is simple and clean.

Best larger-size option

Kraken is often better for larger purchases because pricing can be tighter.

Important warning

If you are sending USDC to Polymarket, make sure you use Polygon.