If I shield ZEC, what can I do with it? Answer: Hold it or transfer it, right? To do any DeFi with it, I have to unshield it? So to swap in/out, I give up privacy first? I guess I could shield ZEC, transfer to other shielded addresses, then unshield later to store/spend/use it. But most CEXs only accept unshielded ZEC? So if I buy ZEC on a CEX, it has to be transparent ZEC and if I withdraw/send that ZEC to a wallet, the CEX has me now linked. In order to spend ZEC, practically speaking, then I have to unshield it, because very few, if anyone, accepts shielded ZEC? Ofc, I could pay someone else with a shielded address, if I can track someone down willing to accept shielded ZEC. All this to say, I can store value indefinitely in shielded ZEC and potentially transfer/pay it to other wallets, but the path post-buying ZEC, and prior to shielding ZEC, is likely doxxed onchain through an exchange relationship. So I can't buy/acquire ZEC, without exposing myself. And I can't use ZEC as money, without unshielding it? But it is money? Superior private money? Just money I can't use?