$1,000,000 would kill bitcoin

[Wilhelm]

Even $100,000 would kill it.  If 1 sat (or even 100 sat) == $1 then the fees would grind the system to a halt.  The fees would be so high relative to the amount sent, that it wouldn't be worth it.  From an investment perspective 1 sat==1$ is a nice round number.  From a users perspective, only being able to buy things divisible by 1$ is crap.  

What a crock of shit...

Bitcoin is divisible far far far beyond a Satoshi.

https://en.bitcoin.it/wiki/Help:FAQ#How_divisible_are_bitcoins.3F

"How divisible are bitcoins?
A bitcoin can be divided down to 8 decimal places. Therefore, 0.00000001 BTC is the smallest amount that can be handled in a transaction. If necessary, the protocol and related software can be modified to handle even smaller amounts."

[proudhon]

lol, $20k bitcoin will kill bitcoin because $20k bitcoin already did. Bitcoin will never reach $20k again, and certainly won't ever sustain prices where we're at now over the long term, much less above $20k.

[The Sceptical Chymist]

It won't reach that Top .. ever.. so don't worry:)

That's what people said about bitcoin reaching $1000 back in the day, I'm sure.  And then there were probably people swearing bitcoin would never reach $10k....then it did.  So you never know. 

But as to OP's point, I've often wondered about this myself--if the price rises high enough, it might be cost prohibitive to actually send bitcoin.  Maybe if you were sending huge amounts it might be worth it, but there's no way anyone would be foolish enough to send either small amounts (like those for purchases) or dust.  I would imagine at that point there would be no more faucets, and the number of people actually using bitcoin for things would drop off a cliff.  But who knows.  Not me, I'm just thinking out loud here.

My guess is that if btc went to those moon prices that we never dreamed possible, people would start using altcoins in a big way--and there certainly are enough of them to choose from.

[Lanatsa]

Even $100,000 would kill it.  If 1 sat (or even 100 sat) == $1 then the fees would grind the system to a halt.  The fees would be so high relative to the amount sent, that it wouldn't be worth it.  From an investment perspective 1 sat==1$ is a nice round number.  From a users perspective, only being able to buy things divisible by 1$ is crap. 

Don't stress out yourself yet we wont even reach up those numbers.Okay lets presume that we are already into these levels.
Fees wont really be a big thing as long the network isn't congested.No matter what would be the price if the network isn't busy then fees would
really be just still on minimal state.

[Febo]

Even $100,000 would kill it.  If 1 sat (or even 100 sat) == $1 then the fees would grind the system to a halt.  The fees would be so high relative to the amount sent, that it wouldn't be worth it.  From an investment perspective 1 sat==1$ is a nice round number.  From a users perspective, only being able to buy things divisible by 1$ is crap. 

Bitcoin price is not limited by cost of the fee but by energy to secure network. Right now we spend less then a percent to secure Bitcoin network. With 20 times higher price there will be 10% of all energy used.  Increase of energy price will definitively help. And I dont believe we will ever again have this cheap energy as of now.

[WinslowIII]

Reading through this thread just convinces me even more that the vast majority of today's bitcoin holders will have sold by the time the price crosses $100k. By the time it crosses $1m/btc, many will have hanged themselves, and many more will have panic bought back as the value of fiat collapses - their gained fiat acquiring but a fraction of the bitcoin they once held.
And all because they believed it impossible.