The volume traded in the past 24h is 1,029,561 BTC, so, that 8,000 BTC doesn't represent the 1%. It looks like a big transaction but it isn't at all.

For sure a transaction like that will change the price a bit, but isn't something to worry about, if we follow the whale alert on Twitter we will see transactions like that all days. For an example, 2 hours ago someone sends 3000BTC https://twitter.com/whale_alert/status/1384898935337148426