In this quote, Satoshi is expressing his confidence that electronic currency will become a reality in the near future, and that the concept of decentralized, trustless currency that he has introduced with Bitcoin will play a key role in its adoption.
Specifically, Satoshi is saying that now that he has shown that it is possible to create a decentralized, electronic currency that doesn't rely on a trusted third party (such as a bank or government), he expects that some form of electronic currency will become widely used within the next 10 years.
The phrase "won't inevitably get dumbed down" is a reference to the fact that previous attempts at creating electronic currency systems have often been watered down or compromised by the need to rely on a trusted third party. Satoshi is saying that these systems have been vulnerable to being "dumbed down" or restricted by the trusted third party, which can impose its own rules and regulations on the system, limiting its potential and undermining its decentralized nature.
By contrast, Bitcoin and other decentralized cryptocurrencies are designed to be trustless, meaning that they don't rely on a central authority or trusted third party to function. Instead, they use cryptography and game theory to secure transactions and control the creation of new units.
Satoshi's comment about the trusted third party getting "cold feet" is likely a reference to the fact that traditional financial institutions and governments have often been hesitant to adopt or support decentralized currency systems, because they see them as a threat to their own power and control.
Overall, Satoshi's quote suggests that he believes the decentralized, trustless nature of Bitcoin and other cryptocurrencies will make them more resilient and attractive to users, and that they will ultimately become a widely accepted form of electronic currency.