Bitcoin has been roughly doubling each year (in terms of the number of transactions). But in its current form, the network can only support up to 7 transactions per second. Paypal does about 100 transactions per second and Visa does about 4,000 per second, so some changes will need to be made if bitcoin is to reach these levels.
https://medium.com/@barmstrong/scaling- ... .ikwhg94bv
Nielsons law is important too which looks like this:
