Store of value:
If BTC is accepted by the world as store of value then price will settle into a much tighter non-volatile range. This would be around $200K or so USD.
That has to happen 1st.
By that time who knows if they figured out how to use BTC core for transactions. Let's hypothetically say they don't but with lightning, 1,000 alt coins, etc, the block time for transactions are 10 minutes to the T.
I think BTC core would work better than gold as a store of value on the simple principle its divisible and can travel over the internet in 10 minutes vs. gold.
I think BTC can replaced your savings account. You withdraw from savings account 0-6 times a month.
Think of BTC as a bank/ATM in modern day. Your at lunch with friends. You go to pay "short, I don't have any cash (BTC in the future) it takes 10-30 minutes to go find an ATM. This will be the same time to transfer BTC to your friend or whoever lent you the cash for lunch.
Also, when you withdraw $20 from your ATM, your account doesn't actually have paper $20 bill in it. It has 1's and 0's. And the ATM spits out fiat and reduces your balance.
So going back to BTC as savings account to store value, when you withdraw your $20 in BTC, maybe it spits out ether, xyz coin as that xyz coin will be the cash part. (and all done via phone but just painting picture)
I can see BTC as store of value/savings account, and you convert it a few times a month to xyz coin.
BTC can be savings account, xyz coin can be checking.