fundamentally, i disagree with the core observation of the Sidechain Whitepaper which originally stated (
interestingly, it seems they've changed it):
"the core observation is that “Bitcoin” the blockchain is conceptually independent from “bitcoin” the asset: if we had technology
to support the movement of assets between blockchains, new systems could be developed which
users could adopt by simply reusing the existing bitcoin currency"http://www.blockstream.com/sidechains.pdfas i've said since the start of my participation in Bitcoin: Bitcoin the currency is inextricably linked and intertwined with its blockchain. the blockchain is nothing without the currency.
i'd also flip that around by saying that Bitcoin the currency is nothing without its blockchain.
given all the potential risks and complexities introduced by Sidechains, are they something we should be serious about?
But they are not saying that in the way you suggest they are. Their point is not that Bitcoin the blockchain doesn't need
"bitcoin" the asset but that the asset should not have to be tied only to the Bitcoin blockchain but could, conceptually, be used on other blockchains.
above is the reason, I disagree with what you are suggesting, bitcoin is the asset ledger, money is not the token but memory, you don't own bitcoin, you control a % of the asset ledger. Balance in value and security is maintained by miners making economic value judgments. For PoW to be rewarded appropriately to preserve the network and the distributed allocated of control, miners need to be incentivised . Nodes are incentivised to preserve the ledger because they have value in it, Miners are incentivised to wright to that ledger in lieu of a Block rewards.
this is a dynamic equilibrium but in general if the Bitcoin network grows (number of users) one can expect the utility to grow as it has, (thanks Peter-R) according to Metacafe's law if it grows faster then the mining reward diminishes, then one expects competition in mining to produce coins (miners - create "credit" in the immutable memory ledger called the block reward). What is expected to happen is: 1) innovation in mining efficiency to make better use of the limited and costly resources and energy; 2) miners will use any increase in efficiency to consume all available resource - Jevons paradox gives us a hit of what could be. if not for diminishing rewards to eventual just the cost of writing tx.
in short efficiency in mining innovation is responsible for the hashrate, and the price of bitcoin is reasonable for the amount of energy burned. (energy being important as it is the root of all economic activity and productivity) PoW efficiency is a highly contentious issue among many in other threads, and there too the economics is also not well understood as opponents argue the energy burned and wasted while its clear to those who see it it is is not wasted and the dynamic and economics are sound.
If you tie other assets to the blockchain, by locking bitcoin in, you in effect are reducing bitcoins network and growing another network the SC, what happens then is the value grows in the other network, according to Metacafe's law, and the Bitcoin network is diminished. The result is lower block rewards, and less incentive to mine, all the while bitcoin holders can exchange into the new network further reducing Bitcoins value.
Bitcoin is a success precisely for all the reasons that make it, but a AltChain that leverages the value out of bitcoin, by differentiating bitcoin the currency form bitcoin the ledger, is created not as a competing innovation but as a for profit idea. truly competing ideas compete 1:1 head to head like alts, they dont peg 1:1 and drain the life out of the host.
We have the tech to do secure trust less off Blockchain micro transaction with technologies like micro payment channels, and we have the ability to create secured trust free BTC funds in an exchange or contract environment.
Given the obvious value proposition of the different aspects of sidechains (which you are not honest if you choose to ignore) I would say it is only fair to give the runner a chance to prove itself.
I have not seen any examples of obvious value proposition for SC from an economic point of view that can't effectively be addresses with existing technology. The only one I have respect for is to make the investors money but i dont like that it comes with a risk to Bitcoin, and bitcoin holders.
Are there any examples?