affected the cryptocurrency prices ? yes,it's.
but it's not really significantly,because total amounts that have been collected not really much,
around 800.000$ which is only approximately around 266BTC,
it will only push the price from ex : 2800$ to 2700$ or even less than that.
but,other than that may be some people who's always using alphabay selling their holding because it's not use keeping Bitcoin,
because they're only using it as a payment in alphabay (more likely nobody like that,but everything is possible so we take a worst scenario).

overall free worries,don't take it seriously about alphabay,the most important thing is split chain (likely bip91 but who knows)