If we have btc on Kraken and sell some btc to get etheurem just after the fork, do we get B2X few days after or we need to hold the BTC when Kraken decides to manage B2X?

My goal would be to buy btc to get the free b2x then to buy ethereum before the price goes up when many people will sell the btc they bought to get the free b2x.

Hi,

I'm learning how bitcoin works and there is something I'm not sure I understand about Lighting network.

I've read it will solve the transaction volume (and fees) problem and that Bitcoin could be then used for daily transactions.
At the same time, it looks like Lighting network only makes sense if transactions are bidirectionnal. For instance I don't see why it's useful to pay the grocery store or my rent to my landlord, since they won't send me money on their side.

Am I missing something?