The 67th-ranked Africans have been the surprise package of their first global finals, drawing with former champions Spain and Uruguay in the group phase before going down 3-2 after extra time against the title holders.
Former centre-half Bubista was the architect of the project, and he thought the reaction to the loss by his players, most of whom do not play in elite leagues, showed how far they had come.
"The feeling in the dressing room is one of sadness," he told reporters. "We're sad, of course; we're sad because we're leaving the competition and because we got so close, so close.
"Even though they are sad, the players were hugging each other, and they were crying. This is part of growing. This helps us grow, and also shows that the team has a soul."
Bubista said that Cape Verde staying in the match for the full 120 minutes against a great team on Friday was a huge source of pride.
"I feel pride in my players and what they did. They did it with dignity and courage," he added.
"I think Argentina showed why they are world champions. I think I can say our team showed how willing they were to play this match.
"I don't think any other team could have scored two goals against Argentina and taken the match into extra time. I think that shows the character of our team, how skilled our team is.
"They did it with bravery, and never did we lose our identity."
Bubista said throughout the tournament that Cape Verde's first World Cup campaign was not just about football but also about the spirit of the island-nation.
"More so than just playing, this was about showing the world our identity," he said.
"Ours was a team that throughout the entire tournament, for as long as we were here, we wanted to play and we wanted to play against the best teams in the world.
"We played fairly, and we stayed on a level playing field with our opponents.
"I think everyone should thank the players for their tournament, because they showed what our small country is about."
World Cup 2026
The 2026 World Cup will be held from June 11th to July 19th in the United States, Canada and Mexico. The tournament will feature 48 national teams and will be played in 16 modern stadiums.
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