Yes, this is an issue with ethereum. However: 1. Geth/Mist now supports a "light client" mode that requires much less storage and maintains most of the strong

Yes, this is an issue with ethereum. However: 1. Geth/Mist now supports a "light client" mode that requires much less storage and maintains most of the strong crypto guarantees. 2. Most of the size problem is due to the complexity in efficiently optimizing the serialized data, this will improve in the near future. 3. Ethereum is on the forefront of research into scalable blockchain technology, which has the potential to resolve this problem.