It all depends on the project. If the project has great prospects, then it is worth buying its tokens as soon as you have such an opportunity.
As a rule, very good projects are bought up at the preliminary sales stage.
Other projects have increased risks and they are better to buy already when they begin to bargain on the exchanges. This is due to the fact that in many projects the price drops immediately after the end of ICO.

Normally, it would be best to buy during ICO but because of the current bearish market situation, it is good one waits and buy during exchange listing, this is because recently, i noticed that once a token is listed though not all, it drops below ico price, so i think that will be the best time to buy.

I probably would either now began to buy, or would look a little more, because there is talk about the fact that the market in the near future can make a trip to the bottom again, will punch all possible bottoms, and then fly,but then who knows how it can actually work

For now, you should buy Altcoin through an exchange, besides being clearly in the market, you can see the price movements, so you can choose when to buy and sell. Maybe this is one way that we avoid fraud and reduce the risk of loss.

To maximize your gainings you have to find a pretty new altcoin.
If you choise the right one, you can make the jackpot!

In my experience, I can say that investing in ICO and buying a token is worth it after the project has collected the softcap and presented the product. This project can definitely be good. And tokens when entering the listing on the exchange will be more expensive than the purchase price.

I would buy altcoins in exchanges after ICOs are finish because if you buy during the ICOs it is very high and when their token are being listed on exchange it was very cheap and it could not the ICOs price. I think that is the best time to buy altcoins.

when it's time to buy the altcoin I don't think it's determined. we just have to look at the situation ourselves, when we buy it, and we also need to look at the price of the coins we will buy. does the price make us able to buy it or not, and we also need to buy a coin that is trusted. because now we need to be careful.

with the current market situation, I think all crypto assets are in a cheap condition. but actually there is no word that is the most appropriate time for investment, because all the time I think it can be done, it is fortunate for those who are new to crypto now, because they can buy at a cheap price and are likely to get future benefits.

Everything is based on investor confidence and calmness. I, for example, when a project I invest increased twice, and I decided not to sell them to wait for it to continue to rise, although there was no point to help me know if it could increase. And the result was that I was wrong, then the token started to reduce the price without braking and decided my investment was losing money