Seeing big walls on the ask is normal in bull markets. It implies that people can sell on the ask rather than dumping at market and aren't causing a panic of traders dumping at market.
Yes, obviously the whale is confident his wall will be eaten because we are in a bull market. In a bear market it would cause a drop and the recovery would be unlikely. Though i am not sure Saturday is the best day of the week to do so.Why not? Last weekend was the start of this big leg up.