No matter how adopted lightning network is, it will not be good for large amount of Bitcoin.
People won't be buying cars or houses through LN.
I don't get that. Why wouldn't it be good for large amounts? Let's say that I have 1000 BTC in an address. Why would it be bad to open a channel depositing 100 BTC and use it for buying cars, houses etc? It's designed for micro-payments, but I'll avoid the mining fees whether I deposit 0.01 or 100 BTC. Someone may want to send and receive huge amounts everyday. He'll find it cheaper if he uses the LN to avoid the mining fees.
the problem is right
here and here
v v
blackhat [100btc><0.1btc] partner [0.1btc><0.1btc] friend [0.1btc><0.1btc] car dealer
they cant push 100btc to the car dealership via routing from you.. because partner and his friend dont have 100btc for them to be used as a go-between
LN only works if everyone had more balance than the payment needing to be routed
LN is promoted for "great for coffees" ($4) when average balance of routers in-line is over $4 to allow the payment
oh and then there is this issue
richguy [2btc><0.1btc] blackhat [100btc><0.1btc] partner [0.1btc><0.1btc] friend [0.1btc><0.1btc] car dealerrichguy decides he wants to pay 'partner' 2btc minutes before you want to buy a car
richguy [0btc><2.1btc] blackhat [98btc><2.1btc] partner [0.1btc><0.1btc] friend [0.1btc><0.1btc] car dealernow you dont have 100btc for your own 100btc payment via 'partner' friend to car dealer