The same has been true for cash withdraws from the bank over a certain amount, for decades. "Suspicious" isn't quite the right word, as there are plenty of legitimate reasons. But the cost (reviewing a small number of large withdraws) vs. probability of detection is good.
The scary part is how low that amount is. It's something like 1000 euro/day and 3000 euro/week. There's also a yearly value. It's been going down over time (by a lot, used to be 5000 euro/day only when the euro was introduced).