The second ability is a solid source of creature removal, and the final ability is a game-ender if you can amass enough creatures in your graveyard
If you dont have the right sleeves at home to bring, I would go so far as to recommend buying them
So, because you can summon the same monster you bounce with it, Swap is prefect in the deck as protection against Sakuretsu Armor, Snatch Steal, or anything else that might target a Sphinx, Gorilla, or squirrel
This card is such a popular find that even the lowest rating and unrated cards sell for anywhere between $1,000 and $10,000
In addition to depending on column setups for the Summoning effect of the Main Deck monsters, most of the Effect Monsters and much of their Spell/Trap support are based on being in the same column as an opponent's card (or the opposite, with "Morning Star" and "Spectrum Supreme")