Taking a loan to trade is very risky, most people that do this are very confident of the trading strategies that they know...Any money that doesn't belong to you shouldn't go into your trading account because the market can go against you at any time.. Trading with your savings isn't advisable, there's a possibility of losing that money and if that happens you might be stranded..30 Dollars out of 300 Dollars is a display of risk management, for someone like me I would even prefer to start trading with 20 dollars, this doesn't make you inexperienced it makes you more conscious of risk management.
Yep, it is too risky to trade with loan money. Those people who take a loan for trading, they may be unaware of the risks. Or they may think they are very skillful in trading, so they think it is easy to take profits. However, there is no guarantee for profits in trading, the market trend can change at any time. If we have unsafe money, we may end up with a problem in the future. How if we get losses because of unpredictable situation the market? Sometimes, even professional traders can avoid the losses if the market trend goes wrong immediately. Well, for professional traders, they may set a cutloss. They won't get severe losses, but it is still a lose, right? 
By the way, it is better to divide the money for savings, investment, and trading. We don't need to use the money for savings. If we have no money, it is better to stop trading temporarily. Why we must force ourselves to trade? It is surely not needed, we should trade whenever we have safe money for trading only.
Should you get a loan? If you can be able to pay it back without relying with those crypto investment then its just fine, but if you are trying out to repay using up the profits then thats a risky move because there's no way that we can be able to tell on when the market do make out such movement. It is just that too impossible that you cant be able to determine on which is a viable option for you or not. You are the ones will be able to balance out in between risks and the reward that it makes. If you do saw that you will be having a hard time on repaying those loans on time then it doesnt have any sense that you will be that pursuing on taking up a loan. Well, it will be that just depending on your risks management because if you are that seeing that you can profit out on the right time and repay those loans then its your call. Just make it sure that you do have back up plans just in case that your investment wont give out that anticipated profit that you could make.