If anything, such a large size is indicative of lack of intent to selloff
seriously, if I wanted to sell-off I would have privately mined a few hundred thousands using a subtler trick that I could actually expect to be "hidden until too late".
Selling off several millions is just plain unpossible
I don't understand this argument. You don't have to sell off several million at once. You can sell off a thousand each day for the next 20 years!
Ensuring price stagnation along the way and having to bother with speculating the market in a manner that doesn't spook it too much with my mighty coinage (and boy wouldn't it be easy to spook it given public nature of blockchains)
meh. Too much mess.
Why even bother with a laundering service.
Because it keeps on trucking with very little effort, after set up, and since coins bound in it are not in the market proper ensuring that I don't "accidentally the price".
Technically, the only difference between "unmoving bitcoins" and "little fun-d" is that it's concentrated under the control of one person you actually sorta can talk to me, unlike unknown number of mysterious people who may or may not be willing to use the coins in a manner you may or may not agree with.
There's really no incentive for you to do that when you can have a steady income for the next 20 years.
To do that, I would actually have to speculate for 20 or whatever years.
To implement the laundry, I only need to pay coders and security auditors once, and receive fairly stable proceeds semi-anonymously with little effort down the line.