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 Cryptocurrency does not have this problem, Bitcoin does. Litecoin, Bitcoin Cash have excellent solutions. Monero is very good as well. Almost every 2nd layer ETH derivative solves the scaling problem, some better than others.
If you believe Bitcoin is the "one and only", you really should get out from under that rock. 
Do yourself a favor, read the Bitcoin white paper and find the section that mentions LN and ETF's.  Then remember Bitcoin worked just fine for fast cheap payments for the first 8 years. 
 I'm not under a rock, and I'm sorry to break it to you, but no cryptocurrency has solved scaling. There's no silver bullet solutions. There are only tradeoffs. LN is _unique_ in that it interconnects these different solutions.

Contrast this with, say, USDC, in which there's no interoperability between the plethora of platforms that support USDC. If you have USDC on Base, try sending it to a Kraken wallet. If you have USDC on SOL in a Phantom wallet, try sending it to a Metamask user. 
 Exactly my observation. lightning is much more practical than other chains L2s.  
 Nobody uses BCH. Litecoin network is far less secure. 
 Truth on BCH, but is Litecoin so much less secure so as to have been attacked successfully?  Comparatively,  it's true $1B is more than $1M, but who would turn down $1M NSA?