I'd probably cap myself at 210k coins max. I might keep a small stash of ~30k just for giveaways and such.
Oh, I'd also sell lazslo a few pizzas for sure. I'll even be nice enough to put foie gras, wagyu beef and truffles on the pizzas, and give him a complementary bottle of wine.
This one seems quite efficient. You gain the most for peanuts. Also the argument about time-space continuum s valid. Maybe BTC would be $5 today or the diff would be gozilions cause of your mining investments in 2009 and this would prevent BTC development.