- You are misreading your charts. The real-world median txn fee is far from $1.50... it's $13: https://bitinfocharts.com/comparison/bitcoin-median_transact...
- A real-world txn is on average 500 bytes, not 250.
- Although you can have multiple recipients/outputs in a single txn ("batch transactions"), it is not used very often. I computed not too long ago 2.6 outputs on average (https://mobile.twitter.com/zorinaq/status/934442392501063685). If batching was unused, we would expect on average 2 outputs. One reason batching is uncommon is that it is by nature doable only by services sending multiple transactions per block, eg. a hosted wallet provider. I can't batch the occasional txns sent from my local phone wallet.
The site you quote is showing the median transaction fee of each block. That's not what I stated: "The median fee for a typical transaction in the past week"
>- A real-world txn is on average 500 bytes, not 250. What's your source? https://bitcoinfees.earn.com/ indicates 225. It seems like you're using a source that assumes two UTXO inputs, which would result in a doubling of the size.
Source for average (mean) txn size: https://charts.bitcoin.com/chart/transaction-size#b2k which is a bit above 500 bytes. Bitcoinfees.earn.com shows the median, not mean, txn size.
https://anduck.net/bitcoin/fees/fpkb_1008blocks.png
It looks like the green bars (median) are at most $50/kB to $70/kB, with a good number of dips to $30/kB and some to $12/kB.
Edit: it is a confusing chart because it has mBTC/kB on one side and USD/kB on the other. And also it assume a constant exchange rate, so it does not reflect the actual price of those transactions at the time they occurred.
The middle chart is showing the median of that block's fees. I'm referring to the median of the last week's worth of confirmed transactions. That's show in the right hand side of the first chart with the, implied, cumulative distribution function.
What if you end up paying on the extremely higher side? Would you feel comfortable using a system in which fees can swing wildly even for a minority of users.
I remember when people were debating putting "almost feeless" on a bitcoin website because transaction fees were so low as a percentage of the amount, but I don't know if that still holds.
Deception and inaccuracies in your statement:
* You're using an average function in a non gaussian distribution.
* Fees in a blockchain are a function of the transaction size
* You can have multiple payments per transaction
* The median fee for a typical transaction in the past week is about $1.50 USD. [1]
[1] https://anduck.net/bitcoin/fees/1008_blocks.php
Median is between $8/kB and $4/kB. $6/kB*.25 kB typical transaction size = $1.50