Well, yes. This is why blockchains are often called expensive. Every single full node on the network has the entire blockchain. And when you make a transaction,

Well, yes. This is why blockchains are often called expensive. Every single full node on the network has the entire blockchain. And when you make a transaction, that transaction gets processed by every single node on the entire network. Needless to say, there are some scalability problems here. And there are a lot of solutions to the scalability problems (such as the lightning network), but generally speaking scalability is probably the biggest and most heated topic in the blockchain space.