This study examines the resilience of investment choices under conditions of extreme uncertainty by comparing traditional and FinTech portfolios through the lens of stress testing. Its objective is to identify the factors that shape the intention to maintain or increase exposure to a FinTech portfolio within a horizon of two years. The analysis is based on primary data collected through a structured questionnaire from 150 participants. The dependent variable captures investment intention, while the main explanatory variables reflect regulatory certainty through MiCA, trust in DeFi, trust in banks under crisis conditions, investment knowledge, and three behavioral stress-testing scenarios: a geopolitical shock, a technological or operational shock, and a real-estate liquidity shock. Estimation was conducted with OLS models in SPSS. The findings show that MiCA is the strongest and most consistent positive determinant of intention. Trust in DeFi is also positive, but its effect weakens once institutional and profile-related variables are considered together. The geopolitical and technological scenarios do not retain independent significance in the multivariate model, whereas the real-estate liquidity scenario emerges as the strongest scenario-based determinant. Investment knowledge and pre-existing investment profile also shape intention. Overall, the study suggests that resilience in this setting depends mainly on institutional trust and perceived liquidity.