We often limit God by assuming He is subject to the laws of science. He is not. These laws explain how God, the Creator and Sustainer of all creation, normally works with His material creation (2 Pet 3:4, JNTC note). In Mk 6:41 Jesus took a few fish and a little bread and reproduced it by breaking it. This was an act of creation which was clearly different from our current laws of science as we now understand them.
If we reflect on this, it should inspire us to pray big prayers. It should motivate us to learn more about the spirit world and how it works. Perhaps we will never need to walk on water but what about praying for miraculous financial provision? One widow in the Old Testament had oil and flour multiply as she was obedient to a specific God-given directive (1 Ki 17:12-16). Another had oil multiply so she could pay her bills (2 Ki 4:1-7). These, too, were creative acts contrary to our laws of science. There is something in all these examples which is profound and which probably will become far more important in the desperate last days before the return of Christ.
Furthermore, since there are evil spirits who oppose God and seek to mislead humans (2 Cor 2:11), some miracles by these evil spirits are intended to ‘corroborate’ rebellion against God (2 Thess 2:9). It can sometimes be easy to misunderstand whether it was God or an evil spirit who did something (Job 1:12 with verse 16; 2 Cor 11:13-15). However, let us not reject what is good because we are too lazy to carefully assess or too afraid to possibly encounter something that is bad.
Instead of being timid, learn to be appropriately bold.