I have read about lightning, and noticed that lightning was created to fasten bitcoin transactions, due to the conjestion of transaction or mempool. Bitcoin was never planned to have conjection, but due to high trx on bitcoin blockchain now increase or stressing the bitcoin node to perform multiple task at a time. And since this transaction cant be performed at once, they becomes stranded in mempool waiting for confirmation. And these increase transaction fees.
Bitcoin nodes are not the one responsible for mining, the miners are the actually center of bitcoin that facilitate transactions to fit into blocks, what nodes do is to verify each confirmed transaction after it has been mined which they keep in the ledger and then they also verify transaction before they relay to another nodes where they go and stay in the mempool of each node awaiting for miners to mine them into a block.
So my question is how does buying of lightning coin a means of increasing bitcoin slow network?
How does an altcoin be of a help to bitcoin?
What do you want to do with lightning bitcoin when you are not a business person or someone that want to be spending bitcoin in for shopping and buying stuffs. If you want bitcoin for holding, do that on exchange and have transfer it to your personal wallet.
Lightning network bitcoin are also real bitcoin but you can't ubuy them to hold as they are meant to be used to transact and when you are done with all the spending, you can close the channel and then your bitcoin will be move from the layer 2 chain to the bitcoin base chain where you can do whatever you like with it, I hope you understand the difference.
Altcoins doesn't help bitcoin in anyway, it's actually the opposite.