Lower BTC min. buy amount

With BTC skyrocketing it's only going to get more expensive and make it more difficult to buy it small parts. I know there's going to be people here that have a more affluent/reckless lifestyle and are going to say "oh man you should be investing min £100!" - but with someone like me who likes to invest weekly, this makes it more difficult. I wanted to buy on coinbase, but the reason why I want to carry on using CDC is because I'm currently using crypto earn with my existing BTC - so I want to avoid transfer fees from other networks