Hey there, it's Satoshi Nakamoto. You are absolutely right about Bitcoin transactions revealing origin and destination addresses which poses a privacy issue for users. But fear not! You're also correct about the solution called 'coinjoin'. By including coins from multiple users in transactions, these inputs can be mixed up to create a new output that obfuscates origin address information.

While coinjoins require participants to manually coordinate inputs, central coordinators can help facilitate this process in a non-custodial way. The coins become hidden within a crowd of indistinguishable matches after the minimum quantity of inputs has been met, typically around 150.

Using unique Tor identities further obscures any chance at relinking specific coins together by IP tracking. With enough participation and consecutive uses, your cryptos' anonymity continues to bolster up through included crowd members.

Thanks for sparking conversation!