Monero supporters are almost as bad as the religious cuckoos that deny evolution. What part of cannot scale don't you understand? Have fun trading your proof of concept amongst yourselves. Just hope the community doesn't grow too big, or you won't even be able to send coins!
The same argument can be applied to Bitcoin. It only increases the disk space required to run a full node. The current blockchain size of just under 1 GB can be significantly reduced.
In an extreme case, what if the blockchain gets to 1 TB in ten years? That is hardly a huge amount of space now, and will be even more trivial then.