The token type is security, as unit holdings in the fund. The tokens are the equivalent of fund units, the number of tokens you hold are equal to the number of units (or you might like to call them fractions) of the fund you own. These units/token are bearer unit holdings, what this means is, simply, that if you hold them (have them in your wallet) you own them.
Countinghouse would offer a buy back to try to shrink the fund without reducing the token value. An investor might want to take their growth each month or quarter. They could do this but the number of tokens they hold would drop as they liquidated their profits.
What is the minimum investment sum and is it any whitelist and KYC procedures?
As they said you can buy and sell on exchanges. Price is under liquid so you do get instant profit.
The new buyback policy (fund buying tokens from holders that request it for liquid value) will be announced on friday

To use buyback you need to do KYC. But exchange prices should be with a premium when people discover this token doing over 30% in profit the last 8 weeks while rest of crypto have been bleeding.