http://invest3b3jgwidbvcczoj2tzk4wjb5gyhcrbyjfazdnbzs3qo5ntcqad.onion/bitcoin-sign/index13.html
Thus, we see three approaches to building advanced applications on top of cryptocurrency: building a new blockchain, using scripting on top of Bitcoin, and building a meta-protocol on top of Bitcoin. Building a new blockchain allows for unlimited freedom in building a feature set, but at the cost of development time, bootstrapping effort and security.