As far as "easily confiscated" this is not true for fiat currencies.
If you hold your cash in fiat currencies and use an account such as PayPal to hold small amounts for actual (even global) transactions, it's practically superior to Bitcoin.
Also--if you're going to hold your cash in fiat, be sure it's not in Venezuela, Zimbabwe, Cyprus, or India. And keep telling yourself issues like theirs can't happen with the fiat currency you're using.
At present day, SEPA SCT (no Inst) offers low to zero fee same-day transactions, Bitcoin transactions of the same fee will take longer (I had one stuck for a couple days at a 5ct fee this year)
Would you be able to re-send that $10,000 to someone else after that 15 seconds?
I'm no expert on SEPA, but it looks to me like (as a practical matter) we are not talking about 15 seconds for normal people [1].
[1] https://ingpcm.com/en/payments-collections/sepa/sepa-credit-...
SCT Inst, the new standard that is coming out is 15 seconds and yes, if you send me 10k$ I can book those 10k$ elsewhere within those 15 seconds (if I can type my TAN that fast)
I can agree that Bitcoin can makes some guarantees that a Bank for example could not make. But to some extend I doubt I need those guarantees, my bank hasn't stolen from me and has no track record of doing so, personally, I'm fine with trusting them for most of my net value.
That of course doesn't mean I don't play around with Cryptocurrencies, Ethereum is quite an exciting tool to play around with for example. Bitcoin is a bit boring though, plenty of other coins have replicated the functionality.