VNTX has two investboxes on yobit. One is empty and the other one is limited. So its not recommended there to invest.
For those, who are not familiar in checking, if an investbox is empty or not:
1) You can check each investbox, independent from owning the coin or not. (Lets presume, we don't have any coin)
2) Type in the maximum amount into the investbox.
3) Click on invest.
4) If the investbox can't pay for maximum amount you will get a message, that there are not enough coins for first payment.
5) If the investbox can pay for the maximum amount, you will only get a message, that your wallet for this currency is empty/doesnt have enough coins, because you have no coin.
6) If the investbox for maximum amount is empty, you can try out several amounts to see, how much is still in the investbox.

So to summarize for those, who want to invest in vntx for investbox, will probably soon face a bad surprise and loose money.