Yeah, I've been playing for a little under a month now (closing in on day 30 in terms of daily rewards) and I'm currently sitting on a little over 5 million gold. That's accounting for evolving/blooming most every Knight that stays in my active squads for more than a cup of coffee. Turns out you end up with a LOT of gold when you penny pinch (using ten level 100 manyu on a new Knight takes them to at least level 45 and only costs 1000 gold, converting level 5 manyu to level 20 and level 20 manyu to level 100 is inefficient XP-wise but not gold-wise, etc).

I've been saving ampies as well and have 60-70 of each. Now that I have Kugaisou I have a 6* to use them on too.