8ball
Decolonise colons!
What I've read from those who understand it a lot more than me, is that with blockchain design you have to choose 2 priorities from security, speed and decentralisation - but currently you can't have all 3.
From what little I know, you’ll never have all
3. There seem to be a heap of things where you are after 3 desirable attributes and are faced with a trade-off and you can have two of the attributes you want but not three.
You want a car, say - you may want fast, safe and cheap.
There are heaps of examples.