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1) It allows micropayments without visa, mastercard commission (roughly 0.35 usd +3%)
Bitcoin does not allow micropayments, it's already the leat efficient micropayment channel. what kind of a micropayment channel charges five cents to send a penny shaving? What kind of a micropayment channel can handle *3 TRANSACTIONS PER SECOND, MAXIMUM SUSTAINED"?
Right now Bitcoin handles 5 per second and it will scale just like the internet scaled from 56kb modems at home to 100MB modems, remember? When we had 56kb, there was no youtube and 100MB would be an excess. Same goes here, when we will need 100 transactions per second, then there will be 100 per second.
Ok lets compare visa payments micro and macro (i don't see any positive sides for visa):
Visa: 0.5 USD + 0.35 + 0.01 = 0.86
Bitcoin: 0.5 USD + 0.03 = 0.53
The positive side of Visa is that it *could* handle nontrivial number of micropayments, while Bitcoin couldn't.
Being able to do a job vs. not being able to do it is considered a plus IRL
3tps sustained (or 5, or 7 peak, won't quibble) is simply not enough. This is what Bitcoin is capable of now. Not a question of modem speeds, simply how many transactions could be reliably included in a 1MB block. Saying "when we will need 100 transactions per second, then there will be 100 per second" is ridiculous -- that's what the whole scaling/blocksize debate is about, the thing that made Mike Hearn, Bitcoin's ex-lead programmer, say that Bitcoin is a failed experiment & quit
There are currently two lines of thought re. scaling: Classic and Core.
Classic team is proposing a temporary fix: double the blocksize limit now, doubling the number of transactions currently possible. This would work, but has (justifiably) been called "kicking the can down the road" -- 7 (or 14) transactions per second is still laughably small for a serious payment channel.
For perspective:
"In 2010, Visa was handling on average around 2,000 transactions a second, with a daily peak rate of 5,000 transactions a second. During busiest season of the year it peaked to 11,000 transactions a second (Dec 23)1. In 2010 they had burst capacity of 24,000 transaction per second with no degradation of transaction quality."And, of course, scaling Visa is trivial -- add moar data centers.
Core team feels that Bitcoin couldn't (and shouldn't) scale. Instead, they're banking on another network -- the Lightning Network, being built *on top* of Bitcoin.
Then, people could start transacting on Lightning Network, relegating Bitcoin to being a settlement layer.
Of course, this is a clumsy solution for many reasons, not the least of which is this: Lightning works like a gift card, not cash.
Before Alice can buy a cup of coffee from Bob via Lightning, Alice must decide how many cups she is likely to buy from Bob in the foreseeable future, and pay for those all those cups. Like buying a gift card. Alice would have to
create such payment channels buy such gift cards from every person or business she pays via the Lightning Network.
TL;DR: While a credit card lends you a sum of money (for free) to buy stuff & sends you a bill at the end of the month, Lightning will make you pay that bill in advance, *before* you could spend a penny of it. No thanks.
But you're right, this is getting way off topic & too many tangents. If you feel like moving this to some other thread, PM me and I'll follow
Edit re. 40%: Sorry, my mistake, it's "Europol said that, according to its data,
bitcoin accounts for as much as 40% of criminal-to-criminal payments online"
http://www.coindesk.com/europol-bitcoin-european-cybercriminals/Still, quite a slice, considering the number of BTC transactions vs. ...oh, PayPal transactions (which account for only 25%)