How come there is no cryptocurrency pegged to the value of Bitcoin but with superior transferability?
Compare with the gold standard. Most people would never actually cash in their banknotes to get gold, because gold is awkward and unpractical to use in daily life (kind of like bitcoin). The fact that you are guaranteed the notes value in gold makes a bank note much more practical and almost as reliable.
There are tons of cryptoes out there, but most of them are (to me) worthless since they are not following the value of bitcoin or any other storage of value. At the same time Bitcoin is far too slow to make daily life transactions. Can't a contract be made to guarantee an 1-x conversion rate, or what?
Couldn't a more cost efficient technology bridge them, like a currency using DAG (or whatever) for a daily-use currency? Very few people store their bitcoin on an exchange because it's not as secure, but I still bet most of us bought or sold bitcoins and therefore at some point stored them on an exchange for a short amount of time.
Why are no other currencies using bitcoin as a store of value?
Because it's still not possible, but with Lightning Network, Litecoin (for example, but this would be most ideal as it's got a long story and the tech needed + it's a simple coin) could work as fiat backed by BTC with atomic cross chain transactions.
But with LN and segwit, Bitcoin itself can be issued as "fiat backed BTC". I would have liked for BTC to stay purely as digital gold and a coin like Litecoin to take this role tho.
We'll have to wait and see how things develop in 2018-2019 for this.