Who writes price feeds onto the blockchain? Many people can't answer!
A push-based oracle actively writes prices to the blockchain according to rules set by the oracle network, so contracts can read the latest on-chain prices at any time.
The advantage of a push-based oracle is that contracts can use the prices right away. The tradeoff is that the oracle network must keep paying Gas to push updates, so the update frequency can't be increased indefinitely.
Don't follow the crowd just because everyone around you is buying.
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