25k is a reasonable amount 
If the price increase (let's say 1 Pie = 1 dollar), masternode collateral amount maybe could be changed to 1k - 5k 
If you think 25k is big amount, please go to Dash, for masternode just need 1000 Dash
If the price increase (let's say 1 Pie = 1 dollar), masternode collateral amount maybe could be changed to 1k - 5k As I had warned, people are dumping their Piecoin as the number of pie coins for a MN is set too high. They should have accepted the result of their twitter survey in which 50% of respondents chose 5-10k coins for a MN.
If you think 25k is big amount, please go to Dash, for masternode just need 1000 Dash