Why are there so many unconfirmed bitcoin transactions?
Could you elaborate on the reasons behind the proliferation of unconfirmed Bitcoin transactions? It seems to be a prevalent issue in the cryptocurrency world, and I'm curious to understand the underlying factors. Is it due to a surge in transaction volume? Or perhaps a limitation in the block size that's causing a backlog? Could miners' incentives also play a role, as they prioritize transactions with higher fees? I'd appreciate a detailed explanation of the key factors that contribute to this phenomenon.