Finally I bought coins for the masternode. It remains only to buy the VPS. I hope in the long-term perspective that my investments will pay off, because the project looks promising. How many coins are paid from the masternode per month?
Right now:
CRDS per day for 1 MN: 3.9823
It mean about 120 CRDS per month
The cost of a cheap VPS is about 5$ - the same 120 CRDS at the current rate. Then it is better to leave the coins for long-term storage

I could buy more masternodes, but given the turnover of trading on the exchange - without a significant increase in the exchange rate, this can not be done.