Consider it like this:

- is like an envelope to put some money inside that you want to give them to somebody and do not want others to see it.

- once you get that envelope with money, if are not too much money, you usually keep the envelope as it is, to use it later, either you give it to somebody else with the same envelope or you just take out the money from it and give them in hand (LN).

- if are a large amount, you take out part of them and put them into a safe (LN or onchain) for keeping. You are keeping only a small amount in that envelope.

I personally will not keep in ecash mints more than 100k/mint. I usually redeem the sats into a private LN node.

Keep in mind: ecash is custodial.

See? You zapped my note, sats goes to a minibits ecash wallet.

Is a perfect decoy for receiving, not revealing the final destination.

From that minibits wallet I move the sats, when are accumulating in a decent amount to specific LN wallets or even I make small payments.

I see many users on nostr using a "self-custodial" LN address to receive zaps, but IMHO that is wrong for a public use. Private self-custodial LN address should be used ONLY for private things, between parties that you know and trust (ex. business partners), not with random strangers on internet.

As I explained in this guide:

https://darth-coin.github.io/beginner/getting-started-ln-address-en.html

Custodial non-KYC are a perfect decoy to receive. Be a master in using them. It is nothing wrong using wisely a custodial service but holding your rest of the stash on self-custodial services.

For zapping on nostr I also use another decoy, Alby and I do not need to reveal my other private self-custodial nodes.